msm-4.14

mirror of https://github.com/rd-stuffs/msm-4.14.git synced 2025-02-20 11:45:48 +08:00

Author	SHA1	Message	Date
Arian	3a330c6445	Merge branch 'android-4.14-stable' of https://android.googlesource.com/kernel/common into HEAD Change-Id: I714223aa1f97959bd97b6bf758511466c9394bd8	2022-03-16 00:46:24 +01:00
Greg Kroah-Hartman	c1013a481e	This is the 4.14.200 stable release -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAl91udkACgkQONu9yGCS aT5wdw//Wn7Nd1kcd1h2umXWcn2rjLbrflmFMtAY32YSDhT85EQaTQMckeLzVKSi KPIPdNbjKhOirlizM6+mBv3EKn3bNbdDFeq0qGy0WI7DAT2Amyn8JRi18GKgM1z/ BBzmOldG2oeFUlFes5ADdVm0b3p+iiQ5WqzIJvLkBeV1HrLAQ2/zAl6ixpUwP2wr sZymWkCXUUG2ZYn7ZxX6SXKvfvSv+GKUD0ImX82Q1DvAcQHSyiZ9/o9/pZbS4m1t innS1EXJEEZHd1x61EBu2WrQkNwXvlpTDZNa7at9Lc5Uys6NsgfUkx4+fTyqDT8h FfnxGaP9qHJRImVpxdBHsZGvUheDTVPPUk3eNNyeR1wmEz/OPCQmPIPIz0sw1TJt LL0d4XN1rLjRSUGv+q1+Y6nbc85eU7nyJG/qB35Fag4z27x3P7D/4queR1hAij37 xp6MesrmEHPA7I4xV9jTzCRvY+O5MAughhOJMzZrn2f95EpC3Mg48OHdYRtktc1b 4L9Vb/HeQ6s0hgVZhkdNfoBPsi797YNCd5WNccKpAdq17mG5s6+6qJxBgCqgHS/i 4gjeR2IgSOL0KW2eE7STn8fgyY86ZepNsONkX6I+7n1h0lC7gVH6VtW5fzyvg9Bw RLA5ulOqUc+f8Ll7MwzbRL3+wiNN4jkX5NHYpaQB2nWVEO9A+cs= =76oN -----END PGP SIGNATURE----- Merge 4.14.200 into android-4.14-stable Changes in 4.14.200 af_key: pfkey_dump needs parameter validation phy: qcom-qmp: Use correct values for ipq8074 PCIe Gen2 PHY init KVM: fix memory leak in kvm_io_bus_unregister_dev() kprobes: fix kill kprobe which has been marked as gone mm/thp: fix __split_huge_pmd_locked() for migration PMD RDMA/ucma: ucma_context reference leak in error path hdlc_ppp: add range checks in ppp_cp_parse_cr() ip: fix tos reflection in ack and reset packets net: ipv6: fix kconfig dependency warning for IPV6_SEG6_HMAC tipc: fix shutdown() of connection oriented socket tipc: use skb_unshare() instead in tipc_buf_append() bnxt_en: Protect bnxt_set_eee() and bnxt_set_pauseparam() with mutex. net: phy: Avoid NPD upon phy_detach() when driver is unbound net: add __must_check to skb_put_padto() ipv4: Update exception handling for multipath routes via same device geneve: add transport ports in route lookup for geneve serial: 8250: Avoid error message on reprobe mm: fix double page fault on arm64 if PTE_AF is cleared scsi: aacraid: fix illegal IO beyond last LBA m68k: q40: Fix info-leak in rtc_ioctl gma/gma500: fix a memory disclosure bug due to uninitialized bytes ASoC: kirkwood: fix IRQ error handling media: smiapp: Fix error handling at NVM reading arch/x86/lib/usercopy_64.c: fix __copy_user_flushcache() cache writeback x86/ioapic: Unbreak check_timer() ALSA: usb-audio: Add delay quirk for H570e USB headsets ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out scsi: fnic: fix use after free clk/ti/adpll: allocate room for terminating null mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd_setup() mfd: mfd-core: Protect against NULL call-back function pointer tracing: Adding NULL checks for trace_array descriptor pointer bcache: fix a lost wake-up problem caused by mca_cannibalize_lock RDMA/i40iw: Fix potential use after free xfs: fix attr leaf header freemap.size underflow RDMA/iw_cgxb4: Fix an error handling path in 'c4iw_connect()' mmc: core: Fix size overflow for mmc partitions gfs2: clean up iopen glock mess in gfs2_create_inode debugfs: Fix !DEBUG_FS debugfs_create_automount CIFS: Properly process SMB3 lease breaks kernel/sys.c: avoid copying possible padding bytes in copy_to_user neigh_stat_seq_next() should increase position index rt_cpu_seq_next should increase position index seqlock: Require WRITE_ONCE surrounding raw_seqcount_barrier media: ti-vpe: cal: Restrict DMA to avoid memory corruption ACPI: EC: Reference count query handlers under lock dmaengine: zynqmp_dma: fix burst length configuration powerpc/eeh: Only dump stack once if an MMIO loop is detected tracing: Set kernel_stack's caller size properly ar5523: Add USB ID of SMCWUSBT-G2 wireless adapter selftests/ftrace: fix glob selftest tools/power/x86/intel_pstate_tracer: changes for python 3 compatibility Bluetooth: Fix refcount use-after-free issue mm: pagewalk: fix termination condition in walk_pte_range() Bluetooth: prefetch channel before killing sock KVM: fix overflow of zero page refcount with ksm running ALSA: hda: Clear RIRB status before reading WP skbuff: fix a data race in skb_queue_len() audit: CONFIG_CHANGE don't log internal bookkeeping as an event selinux: sel_avc_get_stat_idx should increase position index scsi: lpfc: Fix RQ buffer leakage when no IOCBs available scsi: lpfc: Fix coverity errors in fmdi attribute handling drm/omap: fix possible object reference leak perf test: Fix test trace+probe_vfs_getname.sh on s390 RDMA/rxe: Fix configuration of atomic queue pair attributes KVM: x86: fix incorrect comparison in trace event media: staging/imx: Missing assignment in imx_media_capture_device_register() x86/pkeys: Add check for pkey "overflow" bpf: Remove recursion prevention from rcu free callback dmaengine: tegra-apb: Prevent race conditions on channel's freeing media: go7007: Fix URB type for interrupt handling Bluetooth: guard against controllers sending zero'd events timekeeping: Prevent 32bit truncation in scale64_check_overflow() ext4: fix a data race at inode->i_disksize mm: avoid data corruption on CoW fault into PFN-mapped VMA drm/amdgpu: increase atombios cmd timeout ath10k: use kzalloc to read for ath10k_sdio_hif_diag_read scsi: aacraid: Disabling TM path and only processing IOP reset Bluetooth: L2CAP: handle l2cap config request during open state media: tda10071: fix unsigned sign extension overflow xfs: don't ever return a stale pointer from __xfs_dir3_free_read tpm: ibmvtpm: Wait for buffer to be set before proceeding rtc: ds1374: fix possible race condition tracing: Use address-of operator on section symbols serial: 8250_port: Don't service RX FIFO if throttled serial: 8250_omap: Fix sleeping function called from invalid context during probe serial: 8250: 8250_omap: Terminate DMA before pushing data on RX timeout perf cpumap: Fix snprintf overflow check cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_work_fn tools: gpio-hammer: Avoid potential overflow in main RDMA/rxe: Set sys_image_guid to be aligned with HW IB devices SUNRPC: Fix a potential buffer overflow in 'svc_print_xprts()' svcrdma: Fix leak of transport addresses ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len ALSA: usb-audio: Fix case when USB MIDI interface has more than one extra endpoint descriptor NFS: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests() mm/kmemleak.c: use address-of operator on section symbols mm/filemap.c: clear page error before actual read mm/vmscan.c: fix data races using kswapd_classzone_idx mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area scsi: qedi: Fix termination timeouts in session logout serial: uartps: Wait for tx_empty in console setup KVM: Remove CREATE_IRQCHIP/SET_PIT2 race bdev: Reduce time holding bd_mutex in sync in blkdev_close() drivers: char: tlclk.c: Avoid data race between init and interrupt handler staging:r8188eu: avoid skb_clone for amsdu to msdu conversion sparc64: vcc: Fix error return code in vcc_probe() arm64: cpufeature: Relax checks for AArch32 support at EL[0-2] dt-bindings: sound: wm8994: Correct required supplies based on actual implementaion atm: fix a memory leak of vcc->user_back power: supply: max17040: Correct voltage reading phy: samsung: s5pv210-usb2: Add delay after reset Bluetooth: Handle Inquiry Cancel error after Inquiry Complete USB: EHCI: ehci-mv: fix error handling in mv_ehci_probe() tty: serial: samsung: Correct clock selection logic ALSA: hda: Fix potential race in unsol event handler powerpc/traps: Make unrecoverable NMIs die instead of panic fuse: don't check refcount after stealing page USB: EHCI: ehci-mv: fix less than zero comparison of an unsigned int arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register e1000: Do not perform reset in reset_task if we are already down drm/nouveau/debugfs: fix runtime pm imbalance on error printk: handle blank console arguments passed in. usb: dwc3: Increase timeout for CmdAct cleared by device controller btrfs: don't force read-only after error in drop snapshot vfio/pci: fix memory leaks of eventfd ctx perf util: Fix memory leak of prefix_if_not_in perf kcore_copy: Fix module map when there are no modules loaded mtd: rawnand: omap_elm: Fix runtime PM imbalance on error ceph: fix potential race in ceph_check_caps mm/swap_state: fix a data race in swapin_nr_pages rapidio: avoid data race between file operation callbacks and mport_cdev_add(). mtd: parser: cmdline: Support MTD names containing one or more colons x86/speculation/mds: Mark mds_user_clear_cpu_buffers() __always_inline vfio/pci: Clear error and request eventfd ctx after releasing cifs: Fix double add page to memcg when cifs_readpages scsi: libfc: Handling of extra kref scsi: libfc: Skip additional kref updating work event selftests/x86/syscall_nt: Clear weird flags after each test vfio/pci: fix racy on error and request eventfd ctx btrfs: qgroup: fix data leak caused by race between writeback and truncate s390/init: add missing __init annotations i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices() objtool: Fix noreturn detection for ignored functions ieee802154: fix one possible memleak in ca8210_dev_com_init ieee802154/adf7242: check status of adf7242_read_reg clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init() mwifiex: Increase AES key storage size to 256 bits batman-adv: bla: fix type misuse for backbone_gw hash indexing atm: eni: fix the missed pci_disable_device() for eni_init_one() batman-adv: mcast/TT: fix wrongly dropped or rerouted packets mac802154: tx: fix use-after-free drm/vc4/vc4_hdmi: fill ASoC card owner net: qed: RDMA personality shouldn't fail VF load batman-adv: Add missing include for in_interrupt() batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh ALSA: asihpi: fix iounmap in error handler MIPS: Add the missing 'CPU_1074K' into __get_cpu_type() s390/dasd: Fix zero write for FBA devices kprobes: Fix to check probe enabled before disarm_kprobe_ftrace() mm, THP, swap: fix allocating cluster for swapfile by mistake lib/string.c: implement stpcpy ata: define AC_ERR_OK ata: make qc_prep return ata_completion_errors ata: sata_mv, avoid trigerrable BUG_ON Linux 4.14.200 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I3d3049dca196c46cb6b2a66d60a5a6a3a099efbb	2020-10-01 17:59:29 +02:00
Qian Cai	6d9fdd1325	mm/swap_state: fix a data race in swapin_nr_pages [ Upstream commit d6c1f098f2a7ba62627c9bc17cda28f534ef9e4a ] "prev_offset" is a static variable in swapin_nr_pages() that can be accessed concurrently with only mmap_sem held in read mode as noticed by KCSAN, BUG: KCSAN: data-race in swap_cluster_readahead / swap_cluster_readahead write to 0xffffffff92763830 of 8 bytes by task 14795 on cpu 17: swap_cluster_readahead+0x2a6/0x5e0 swapin_readahead+0x92/0x8dc do_swap_page+0x49b/0xf20 __handle_mm_fault+0xcfb/0xd70 handle_mm_fault+0xfc/0x2f0 do_page_fault+0x263/0x715 page_fault+0x34/0x40 1 lock held by (dnf)/14795: #0: ffff897bd2e98858 (&mm->mmap_sem#2){++++}-{3:3}, at: do_page_fault+0x143/0x715 do_user_addr_fault at arch/x86/mm/fault.c:1405 (inlined by) do_page_fault at arch/x86/mm/fault.c:1535 irq event stamp: 83493 count_memcg_event_mm+0x1a6/0x270 count_memcg_event_mm+0x119/0x270 __do_softirq+0x365/0x589 irq_exit+0xa2/0xc0 read to 0xffffffff92763830 of 8 bytes by task 1 on cpu 22: swap_cluster_readahead+0xfd/0x5e0 swapin_readahead+0x92/0x8dc do_swap_page+0x49b/0xf20 __handle_mm_fault+0xcfb/0xd70 handle_mm_fault+0xfc/0x2f0 do_page_fault+0x263/0x715 page_fault+0x34/0x40 1 lock held by systemd/1: #0: ffff897c38f14858 (&mm->mmap_sem#2){++++}-{3:3}, at: do_page_fault+0x143/0x715 irq event stamp: 43530289 count_memcg_event_mm+0x1a6/0x270 count_memcg_event_mm+0x119/0x270 __do_softirq+0x365/0x589 irq_exit+0xa2/0xc0 Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Marco Elver <elver@google.com> Cc: Hugh Dickins <hughd@google.com> Link: http://lkml.kernel.org/r/20200402213748.2237-1-cai@lca.pw Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>	2020-10-01 13:12:46 +02:00
Srinivasarao P	0190a01fb1	Merge android-4.14-stable.190 (d2d05bc) into msm-4.14 * refs/heads/tmp-d2d05bc: Linux 4.14.190 ath9k: Fix regression with Atheros 9271 ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb parisc: Add atomic64_set_release() define to avoid CPU soft lockups io-mapping: indicate mapping failure mm/memcg: fix refcount error while moving and swapping Makefile: Fix GCC_TOOLCHAIN_DIR prefix for Clang cross compilation vt: Reject zero-sized screen buffer size. fbdev: Detect integer underflow at "struct fbcon_ops"->clear_margins. serial: 8250_mtk: Fix high-speed baud rates clamping serial: 8250: fix null-ptr-deref in serial8250_start_tx() staging: comedi: addi_apci_1564: check INSN_CONFIG_DIGITAL_TRIG shift staging: comedi: addi_apci_1500: check INSN_CONFIG_DIGITAL_TRIG shift staging: comedi: ni_6527: fix INSN_CONFIG_DIGITAL_TRIG support staging: comedi: addi_apci_1032: check INSN_CONFIG_DIGITAL_TRIG shift staging: wlan-ng: properly check endpoint types Revert "cifs: Fix the target file was deleted when rename failed." usb: xhci: Fix ASM2142/ASM3142 DMA addressing usb: xhci-mtk: fix the failure of bandwidth allocation binder: Don't use mmput() from shrinker function. x86: math-emu: Fix up 'cmp' insn for clang ias arm64: Use test_tsk_thread_flag() for checking TIF_SINGLESTEP usb: gadget: udc: gr_udc: fix memleak on error handling path in gr_ep_init() Input: synaptics - enable InterTouch for ThinkPad X1E 1st gen dmaengine: ioat setting ioat timeout as module parameter hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow regmap: dev_get_regmap_match(): fix string comparison spi: mediatek: use correct SPI_CFG2_REG MACRO Input: add `SW_MACHINE_COVER` dmaengine: tegra210-adma: Fix runtime PM imbalance on error HID: apple: Disable Fn-key key-re-mapping on clone keyboards HID: i2c-hid: add Mediacom FlexBook edge13 to descriptor override scripts/decode_stacktrace: strip basepath from all paths serial: exar: Fix GPIO configuration for Sealevel cards based on XR17V35X bonding: check return value of register_netdevice() in bond_newlink() i2c: rcar: always clear ICSAR to avoid side effects ipvs: fix the connection sync failed in some cases mlxsw: destroy workqueue when trap_register in mlxsw_emad_init bonding: check error value of register_netdevice() immediately net: smc91x: Fix possible memory leak in smc_drv_probe() drm: sun4i: hdmi: Fix inverted HPD result net: dp83640: fix SIOCSHWTSTAMP to update the struct with actual configuration ax88172a: fix ax88172a_unbind() failures hippi: Fix a size used in a 'pci_free_consistent()' in an error handling path bnxt_en: Fix race when modifying pause settings. btrfs: fix page leaks after failure to lock page for delalloc btrfs: fix mount failure caused by race with umount btrfs: fix double free on ulist after backref resolution failure ASoC: rt5670: Correct RT5670_LDO_SEL_MASK ALSA: info: Drop WARN_ON() from buffer NULL sanity check uprobes: Change handle_swbp() to send SIGTRAP with si_code=SI_KERNEL, to fix GDB regression IB/umem: fix reference count leak in ib_umem_odp_get() spi: spi-fsl-dspi: Exit the ISR with IRQ_NONE when it's not ours SUNRPC reverting d03727b248d0 ("NFSv4 fix CLOSE not waiting for direct IO compeletion") irqdomain/treewide: Keep firmware node unconditionally allocated drm/nouveau/i2c/g94-: increase NV_PMGR_DP_AUXCTL_TRANSACTREQ timeout net: sky2: initialize return of gm_phy_read drivers/net/wan/lapbether: Fixed the value of hard_header_len xtensa: update pos in cpuinfo_op.next xtensa: fix __sync_fetch_and_{and,or}_4 declarations scsi: scsi_transport_spi: Fix function pointer check mac80211: allow rx of mesh eapol frames with default rx key pinctrl: amd: fix npins for uart0 in kerncz_groups gpio: arizona: put pm_runtime in case of failure gpio: arizona: handle pm_runtime_get_sync failure case ANDROID: Incremental fs: magic number compatible 32-bit ANDROID: kbuild: don't merge ...compoundliteral in modules Revert "arm64/alternatives: use subsections for replacement sequences" Linux 4.14.189 rxrpc: Fix trace string libceph: don't omit recovery_deletes in target_copy() x86/cpu: Move x86_cache_bits settings sched/fair: handle case of task_h_load() returning 0 arm64: ptrace: Override SPSR.SS when single-stepping is enabled thermal/drivers/cpufreq_cooling: Fix wrong frequency converted from power misc: atmel-ssc: lock with mutex instead of spinlock dmaengine: fsl-edma: Fix NULL pointer exception in fsl_edma_tx_handler intel_th: pci: Add Emmitsburg PCH support intel_th: pci: Add Tiger Lake PCH-H support intel_th: pci: Add Jasper Lake CPU support hwmon: (emc2103) fix unable to change fan pwm1_enable attribute MIPS: Fix build for LTS kernel caused by backporting lpj adjustment timer: Fix wheel index calculation on last level uio_pdrv_genirq: fix use without device tree and no interrupt Input: i8042 - add Lenovo XiaoXin Air 12 to i8042 nomux list mei: bus: don't clean driver pointer Revert "zram: convert remaining CLASS_ATTR() to CLASS_ATTR_RO()" fuse: Fix parameter for FS_IOC_{GET,SET}FLAGS virtio: virtio_console: add missing MODULE_DEVICE_TABLE() for rproc serial USB: serial: option: add Quectel EG95 LTE modem USB: serial: option: add GosunCn GM500 series USB: serial: ch341: add new Product ID for CH340 USB: serial: cypress_m8: enable Simply Automated UPB PIM USB: serial: iuu_phoenix: fix memory corruption usb: gadget: function: fix missing spinlock in f_uac1_legacy usb: chipidea: core: add wakeup support for extcon usb: dwc2: Fix shutdown callback in platform USB: c67x00: fix use after free in c67x00_giveback_urb ALSA: usb-audio: Fix race against the error recovery URB submission ALSA: line6: Perform sanity check for each URB creation HID: magicmouse: do not set up autorepeat mtd: rawnand: oxnas: Release all devices in the _remove() path mtd: rawnand: oxnas: Unregister all devices on error mtd: rawnand: oxnas: Keep track of registered devices mtd: rawnand: brcmnand: fix CS0 layout perf stat: Zero all the 'ena' and 'run' array slot stats for interval mode copy_xstate_to_kernel: Fix typo which caused GDB regression ARM: dts: socfpga: Align L2 cache-controller nodename with dtschema Revert "thermal: mediatek: fix register index error" staging: comedi: verify array index is correct before using it usb: gadget: udc: atmel: fix uninitialized read in debug printk spi: spi-sun6i: sun6i_spi_transfer_one(): fix setting of clock rate arm64: dts: meson: add missing gxl rng clock phy: sun4i-usb: fix dereference of pointer phy0 before it is null checked iio:health:afe4404 Fix timestamp alignment and prevent data leak. ACPI: video: Use native backlight on Acer TravelMate 5735Z ACPI: video: Use native backlight on Acer Aspire 5783z mmc: sdhci: do not enable card detect interrupt for gpio cd type doc: dt: bindings: usb: dwc3: Update entries for disabling SS instances in park mode Revert "usb/xhci-plat: Set PM runtime as active on resume" Revert "usb/ehci-platform: Set PM runtime as active on resume" Revert "usb/ohci-platform: Fix a warning when hibernating" of: of_mdio: Correct loop scanning logic net: dsa: bcm_sf2: Fix node reference count spi: fix initial SPI_SR value in spi-fsl-dspi spi: spi-fsl-dspi: Fix lockup if device is shutdown during SPI transfer iio:health:afe4403 Fix timestamp alignment and prevent data leak. iio:pressure:ms5611 Fix buffer element alignment iio: pressure: zpa2326: handle pm_runtime_get_sync failure iio: mma8452: Add missed iio_device_unregister() call in mma8452_probe() iio: magnetometer: ak8974: Fix runtime PM imbalance on error iio:humidity:hdc100x Fix alignment and data leak issues iio:magnetometer:ak8974: Fix alignment and data leak issues arm64/alternatives: don't patch up internal branches arm64: alternative: Use true and false for boolean values i2c: eg20t: Load module automatically if ID matches gfs2: read-only mounts should grab the sd_freeze_gl glock tpm_tis: extra chip->ops check on error path in tpm_tis_core_init arm64/alternatives: use subsections for replacement sequences drm/exynos: fix ref count leak in mic_pre_enable cgroup: Fix sock_cgroup_data on big-endian. cgroup: fix cgroup_sk_alloc() for sk_clone_lock() tcp: md5: do not send silly options in SYNCOOKIES tcp: make sure listeners don't initialize congestion-control state net_sched: fix a memory leak in atm_tc_init() tcp: md5: allow changing MD5 keys in all socket states tcp: md5: refine tcp_md5_do_add()/tcp_md5_hash_key() barriers tcp: md5: add missing memory barriers in tcp_md5_do_add()/tcp_md5_hash_key() net: usb: qmi_wwan: add support for Quectel EG95 LTE modem net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup_skb llc: make sure applications use ARPHRD_ETHER l2tp: remove skb_dst_set() from l2tp_xmit_skb() ipv4: fill fl4_icmp_{type,code} in ping_v4_sendmsg genetlink: remove genl_bind s390/mm: fix huge pte soft dirty copying ARC: elf: use right ELF_ARCH ARC: entry: fix potential EFA clobber when TIF_SYSCALL_TRACE dm: use noio when sending kobject event drm/radeon: fix double free btrfs: fix fatal extent_buffer readahead vs releasepage race Revert "ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb" KVM: x86: Mark CR4.TSD as being possibly owned by the guest KVM: x86: Inject #GP if guest attempts to toggle CR4.LA57 in 64-bit mode KVM: x86: bit 8 of non-leaf PDPEs is not reserved KVM: arm64: Stop clobbering x0 for HVC_SOFT_RESTART KVM: arm64: Fix definition of PAGE_HYP_DEVICE ALSA: usb-audio: add quirk for MacroSilicon MS2109 ALSA: hda - let hs_mic be picked ahead of hp_mic ALSA: opl3: fix infoleak in opl3 mlxsw: spectrum_router: Remove inappropriate usage of WARN_ON() net: macb: mark device wake capable when "magic-packet" property present bnxt_en: fix NULL dereference in case SR-IOV configuration fails nbd: Fix memory leak in nbd_add_socket arm64: kgdb: Fix single-step exception handling oops ALSA: compress: fix partial_drain completion state smsc95xx: avoid memory leak in smsc95xx_bind smsc95xx: check return value of smsc95xx_reset net: cxgb4: fix return error value in t4_prep_fw x86/entry: Increase entry_stack size to a full page nvme-rdma: assign completion vector correctly scsi: mptscsih: Fix read sense data size ARM: imx6: add missing put_device() call in imx6q_suspend_init() cifs: update ctime and mtime during truncate s390/kasan: fix early pgm check handler execution ixgbe: protect ring accesses with READ- and WRITE_ONCE spi: spidev: fix a potential use-after-free in spidev_release() spi: spidev: fix a race between spidev_release and spidev_remove gpu: host1x: Detach driver on unregister ARM: dts: omap4-droid4: Fix spi configuration and increase rate spi: spi-fsl-dspi: Fix external abort on interrupt in resume or exit paths spi: spi-fsl-dspi: use IRQF_SHARED mode to request IRQ spi: spi-fsl-dspi: Fix lockup if device is removed during SPI transfer spi: spi-fsl-dspi: Adding shutdown hook KVM: s390: reduce number of IO pins to 1 UPSTREAM: perf/core: Fix crash when using HW tracing kernel filters ANDROID: fscrypt: fix DUN contiguity with inline encryption + IV_INO_LBLK_32 policies ANDROID: f2fs: add back compress inode check Linux 4.14.188 efi: Make it possible to disable efivar_ssdt entirely dm zoned: assign max_io_len correctly irqchip/gic: Atomically update affinity MIPS: Add missing EHB in mtc0 -> mfc0 sequence for DSPen cifs: Fix the target file was deleted when rename failed. SMB3: Honor persistent/resilient handle flags for multiuser mounts SMB3: Honor 'seal' flag for multiuser mounts Revert "ALSA: usb-audio: Improve frames size computation" nfsd: apply umask on fs without ACL support i2c: algo-pca: Add 0x78 as SCL stuck low status for PCA9665 virtio-blk: free vblk-vqs in error path of virtblk_probe() drm: sun4i: hdmi: Remove extra HPD polling hwmon: (acpi_power_meter) Fix potential memory leak in acpi_power_meter_add() hwmon: (max6697) Make sure the OVERT mask is set correctly cxgb4: parse TC-U32 key values and masks natively cxgb4: use unaligned conversion for fetching timestamp crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock() kgdb: Avoid suspicious RCU usage warning usb: usbtest: fix missing kfree(dev->buf) in usbtest_disconnect mm/slub: fix stack overruns with SLUB_STATS mm/slub.c: fix corrupted freechain in deactivate_slab() usbnet: smsc95xx: Fix use-after-free after removal EDAC/amd64: Read back the scrub rate PCI register on F15h mm: fix swap cache node allocation mask btrfs: fix data block group relocation failure due to concurrent scrub btrfs: cow_file_range() num_bytes and disk_num_bytes are same btrfs: fix a block group ref counter leak after failure to remove block group UPSTREAM: binder: fix null deref of proc->context ANDROID: GKI: scripts: Makefile: update the lz4 command (#2) Linux 4.14.187 Revert "tty: hvc: Fix data abort due to race in hvc_open" xfs: add agf freeblocks verify in xfs_agf_verify NFSv4 fix CLOSE not waiting for direct IO compeletion pNFS/flexfiles: Fix list corruption if the mirror count changes SUNRPC: Properly set the @subbuf parameter of xdr_buf_subsegment() sunrpc: fixed rollback in rpc_gssd_dummy_populate() Staging: rtl8723bs: prevent buffer overflow in update_sta_support_rate() drm/radeon: fix fb_div check in ni_init_smc_spll_table() tracing: Fix event trigger to accept redundant spaces arm64: perf: Report the PC value in REGS_ABI_32 mode ocfs2: fix panic on nfs server over ocfs2 ocfs2: fix value of OCFS2_INVALID_SLOT ocfs2: load global_inode_alloc mm/slab: use memzero_explicit() in kzfree() btrfs: fix failure of RWF_NOWAIT write into prealloc extent beyond eof KVM: nVMX: Plumb L2 GPA through to PML emulation KVM: X86: Fix MSR range of APIC registers in X2APIC mode ACPI: sysfs: Fix pm_profile_attr type ALSA: hda: Add NVIDIA codec IDs 9a & 9d through a0 to patch table blktrace: break out of blktrace setup on concurrent calls kbuild: improve cc-option to clean up all temporary files s390/ptrace: fix setting syscall number net: alx: fix race condition in alx_remove ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function sched/core: Fix PI boosting between RT and DEADLINE tasks net: bcmgenet: use hardware padding of runt frames netfilter: ipset: fix unaligned atomic access usb: gadget: udc: Potential Oops in error handling code ARM: imx5: add missing put_device() call in imx_suspend_alloc_ocram() net: qed: fix excessive QM ILT lines consumption net: qed: fix NVMe login fails over VFs net: qed: fix left elements count calculation RDMA/mad: Fix possible memory leak in ib_mad_post_receive_mads() ASoC: rockchip: Fix a reference count leak. RDMA/cma: Protect bind_list and listen_list while finding matching cm id rxrpc: Fix handling of rwind from an ACK packet ARM: dts: NSP: Correct FA2 mailbox node efi/esrt: Fix reference count leak in esre_create_sysfs_entry. cifs/smb3: Fix data inconsistent when zero file range cifs/smb3: Fix data inconsistent when punch hole xhci: Poll for U0 after disabling USB2 LPM ALSA: usb-audio: Fix OOB access of mixer element list ALSA: usb-audio: Clean up mixer element list traverse ALSA: usb-audio: uac1: Invalidate ctl on interrupt loop: replace kill_bdev with invalidate_bdev cdc-acm: Add DISABLE_ECHO quirk for Microchip/SMSC chip xhci: Fix enumeration issue when setting max packet size for FS devices. xhci: Fix incorrect EP_STATE_MASK ALSA: usb-audio: add quirk for Denon DCD-1500RE usb: host: ehci-exynos: Fix error check in exynos_ehci_probe() usb: host: xhci-mtk: avoid runtime suspend when removing hcd USB: ehci: reopen solution for Synopsys HC bug usb: add USB_QUIRK_DELAY_INIT for Logitech C922 usb: dwc2: Postponed gadget registration to the udc class driver USB: ohci-sm501: Add missed iounmap() in remove net: core: reduce recursion limit value net: Do not clear the sock TX queue in sk_set_socket() net: Fix the arp error in some cases ip6_gre: fix use-after-free in ip6gre_tunnel_lookup() tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT ip_tunnel: fix use-after-free in ip_tunnel_lookup() tg3: driver sleeps indefinitely when EEH errors exceed eeh_max_freezes tcp: grow window for OOO packets only for SACK flows sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket rxrpc: Fix notification call on completion of discarded calls rocker: fix incorrect error handling in dma_rings_init net: usb: ax88179_178a: fix packet alignment padding net: fix memleak in register_netdevice() net: bridge: enfore alignment for ethernet address mld: fix memory leak in ipv6_mc_destroy_dev() ibmveth: Fix max MTU limit apparmor: don't try to replace stale label in ptraceme check fix a braino in "sparc32: fix register window handling in genregs32_[gs]et()" net: sched: export __netdev_watchdog_up() block/bio-integrity: don't free 'buf' if bio_integrity_add_page() failed net: be more gentle about silly gso requests coming from user scsi: scsi_devinfo: handle non-terminated strings ANDROID: Makefile: append BUILD_NUMBER to version string when defined Linux 4.14.186 KVM: x86/mmu: Set mmio_value to '0' if reserved #PF can't be generated kvm: x86: Fix reserved bits related calculation errors caused by MKTME kvm: x86: Move kvm_set_mmio_spte_mask() from x86.c to mmu.c md: add feature flag MD_FEATURE_RAID0_LAYOUT net: core: device_rename: Use rwsem instead of a seqcount sched/rt, net: Use CONFIG_PREEMPTION.patch kretprobe: Prevent triggering kretprobe from within kprobe_flush_task e1000e: Do not wake up the system via WOL if device wakeup is disabled kprobes: Fix to protect kick_kprobe_optimizer() by kprobe_mutex crypto: algboss - don't wait during notifier callback crypto: algif_skcipher - Cap recv SG list at ctx->used mtd: rawnand: tmio: Fix the probe error path mtd: rawnand: mtk: Fix the probe error path mtd: rawnand: plat_nand: Fix the probe error path mtd: rawnand: socrates: Fix the probe error path mtd: rawnand: oxnas: Fix the probe error path mtd: rawnand: oxnas: Add of_node_put() mtd: rawnand: orion: Fix the probe error path mtd: rawnand: xway: Fix the probe error path mtd: rawnand: sharpsl: Fix the probe error path mtd: rawnand: diskonchip: Fix the probe error path mtd: rawnand: Pass a nand_chip object to nand_release() block: nr_sects_write(): Disable preemption on seqcount write x86/boot/compressed: Relax sed symbol type regex for LLVM ld.lld drm/dp_mst: Increase ACT retry timeout to 3s ext4: fix partial cluster initialization when splitting extent selinux: fix double free drm/qxl: Use correct notify port address when creating cursor ring drm/dp_mst: Reformat drm_dp_check_act_status() a bit drm: encoder_slave: fix refcouting error for modules libata: Use per port sync for detach arm64: hw_breakpoint: Don't invoke overflow handler on uaccess watchpoints block: Fix use-after-free in blkdev_get() bcache: fix potential deadlock problem in btree_gc_coalesce perf report: Fix NULL pointer dereference in hists__fprintf_nr_sample_events() usb/ehci-platform: Set PM runtime as active on resume usb/xhci-plat: Set PM runtime as active on resume scsi: acornscsi: Fix an error handling path in acornscsi_probe() drm/sun4i: hdmi ddc clk: Fix size of m divider selftests/net: in timestamping, strncpy needs to preserve null byte gfs2: fix use-after-free on transaction ail lists blktrace: fix endianness for blk_log_remap() blktrace: fix endianness in get_pdu_int() blktrace: use errno instead of bi_status selftests/vm/pkeys: fix alloc_random_pkey() to make it really random elfnote: mark all .note sections SHF_ALLOC include/linux/bitops.h: avoid clang shift-count-overflow warnings lib/zlib: remove outdated and incorrect pre-increment optimization geneve: change from tx_error to tx_dropped on missing metadata crypto: omap-sham - add proper load balancing support for multicore pinctrl: freescale: imx: Fix an error handling path in 'imx_pinctrl_probe()' pinctrl: imxl: Fix an error handling path in 'imx1_pinctrl_core_probe()' scsi: ufs: Don't update urgent bkops level when toggling auto bkops scsi: iscsi: Fix reference count leak in iscsi_boot_create_kobj gfs2: Allow lock_nolock mount to specify jid=X openrisc: Fix issue with argument clobbering for clone/fork vfio/mdev: Fix reference count leak in add_mdev_supported_type ASoC: fsl_asrc_dma: Fix dma_chan leak when config DMA channel failed extcon: adc-jack: Fix an error handling path in 'adc_jack_probe()' powerpc/4xx: Don't unmap NULL mbase NFSv4.1 fix rpc_call_done assignment for BIND_CONN_TO_SESSION net: sunrpc: Fix off-by-one issues in 'rpc_ntop6' scsi: ufs-qcom: Fix scheduling while atomic issue clk: bcm2835: Fix return type of bcm2835_register_gate x86/apic: Make TSC deadline timer detection message visible usb: gadget: Fix issue with config_ep_by_speed function usb: gadget: fix potential double-free in m66592_probe. usb: gadget: lpc32xx_udc: don't dereference ep pointer before null check USB: gadget: udc: s3c2410_udc: Remove pointless NULL check in s3c2410_udc_nuke usb: dwc2: gadget: move gadget resume after the core is in L0 state watchdog: da9062: No need to ping manually before setting timeout IB/cma: Fix ports memory leak in cma_configfs PCI/PTM: Inherit Switch Downstream Port PTM settings from Upstream Port dm zoned: return NULL if dmz_get_zone_for_reclaim() fails to find a zone powerpc/64s/pgtable: fix an undefined behaviour clk: samsung: exynos5433: Add IGNORE_UNUSED flag to sclk_i2s1 tty: n_gsm: Fix bogus i++ in gsm_data_kick USB: host: ehci-mxc: Add error handling in ehci_mxc_drv_probe() drm/msm/mdp5: Fix mdp5_init error path for failed mdp5_kms allocation usb/ohci-platform: Fix a warning when hibernating vfio-pci: Mask cap zero powerpc/ps3: Fix kexec shutdown hang powerpc/pseries/ras: Fix FWNMI_VALID off by one tty: n_gsm: Fix waking up upper tty layer when room available tty: n_gsm: Fix SOF skipping PCI: Fix pci_register_host_bridge() device_register() error handling clk: ti: composite: fix memory leak dlm: remove BUG() before panic() scsi: mpt3sas: Fix double free warnings power: supply: smb347-charger: IRQSTAT_D is volatile power: supply: lp8788: Fix an error handling path in 'lp8788_charger_probe()' scsi: qla2xxx: Fix warning after FC target reset PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges PCI: rcar: Fix incorrect programming of OB windows drivers: base: Fix NULL pointer exception in __platform_driver_probe() if a driver developer is foolish serial: amba-pl011: Make sure we initialize the port.lock spinlock i2c: pxa: fix i2c_pxa_scream_blue_murder() debug output staging: sm750fb: add missing case while setting FB_VISUAL thermal/drivers/ti-soc-thermal: Avoid dereferencing ERR_PTR tty: hvc: Fix data abort due to race in hvc_open s390/qdio: put thinint indicator after early error ALSA: usb-audio: Improve frames size computation scsi: qedi: Do not flush offload work if ARP not resolved staging: greybus: fix a missing-check bug in gb_lights_light_config() scsi: ibmvscsi: Don't send host info in adapter info MAD after LPM scsi: sr: Fix sr_probe() missing deallocate of device minor apparmor: fix introspection of of task mode for unconfined tasks mksysmap: Fix the mismatch of '.L' symbols in System.map NTB: Fix the default port and peer numbers for legacy drivers yam: fix possible memory leak in yam_init_driver powerpc/crashkernel: Take "mem=" option into account nfsd: Fix svc_xprt refcnt leak when setup callback client failed powerpc/perf/hv-24x7: Fix inconsistent output values incase multiple hv-24x7 events run clk: clk-flexgen: fix clock-critical handling scsi: lpfc: Fix lpfc_nodelist leak when processing unsolicited event mfd: wm8994: Fix driver operation if loaded as modules m68k/PCI: Fix a memory leak in an error handling path vfio/pci: fix memory leaks in alloc_perm_bits() ps3disk: use the default segment boundary PCI: aardvark: Don't blindly enable ASPM L0s and don't write to read-only register dm mpath: switch paths in dm_blk_ioctl() code path usblp: poison URBs upon disconnect i2c: pxa: clear all master action bits in i2c_pxa_stop_message() f2fs: report delalloc reserve as non-free in statfs for project quota iio: bmp280: fix compensation of humidity scsi: qla2xxx: Fix issue with adapter's stopping state ALSA: isa/wavefront: prevent out of bounds write in ioctl scsi: qedi: Check for buffer overflow in qedi_set_path() ARM: integrator: Add some Kconfig selections ASoC: davinci-mcasp: Fix dma_chan refcnt leak when getting dma type backlight: lp855x: Ensure regulators are disabled on probe failure clk: qcom: msm8916: Fix the address location of pll->config_reg remoteproc: Fix IDR initialisation in rproc_alloc() iio: pressure: bmp280: Tolerate IRQ before registering i2c: piix4: Detect secondary SMBus controller on AMD AM4 chipsets clk: sunxi: Fix incorrect usage of round_down() power: supply: bq24257_charger: Replace depends on REGMAP_I2C with select drm/i915: Whitelist context-local timestamp in the gen9 cmdparser s390: fix syscall_get_error for compat processes ANDROID: ext4: Optimize match for casefolded encrypted dirs ANDROID: ext4: Handle casefolding with encryption ANDROID: cuttlefish_defconfig: x86: Enable KERNEL_LZ4 ANDROID: GKI: scripts: Makefile: update the lz4 command FROMLIST: f2fs: fix use-after-free when accessing bio->bi_crypt_context Linux 4.14.185 perf symbols: Fix debuginfo search for Ubuntu perf probe: Fix to check blacklist address correctly perf probe: Do not show the skipped events w1: omap-hdq: cleanup to add missing newline for some dev_dbg mtd: rawnand: pasemi: Fix the probe error path mtd: rawnand: brcmnand: fix hamming oob layout sunrpc: clean up properly in gss_mech_unregister() sunrpc: svcauth_gss_register_pseudoflavor must reject duplicate registrations. kbuild: force to build vmlinux if CONFIG_MODVERSION=y powerpc/64s: Save FSCR to init_task.thread.fscr after feature init powerpc/64s: Don't let DT CPU features set FSCR_DSCR drivers/macintosh: Fix memleak in windfarm_pm112 driver ARM: tegra: Correct PL310 Auxiliary Control Register initialization kernel/cpu_pm: Fix uninitted local in cpu_pm dm crypt: avoid truncating the logical block size sparc64: fix misuses of access_process_vm() in genregs32_[sg]et() sparc32: fix register window handling in genregs32_[gs]et() pinctrl: samsung: Save/restore eint_mask over suspend for EINT_TYPE GPIOs power: vexpress: add suppress_bind_attrs to true igb: Report speed and duplex as unknown when device is runtime suspended media: ov5640: fix use of destroyed mutex b43_legacy: Fix connection problem with WPA3 b43: Fix connection problem with WPA3 b43legacy: Fix case where channel status is corrupted media: go7007: fix a miss of snd_card_free carl9170: remove P2P_GO support e1000e: Relax condition to trigger reset for ME workaround e1000e: Disable TSO for buffer overrun workaround PCI: Program MPS for RCiEP devices blk-mq: move _blk_mq_update_nr_hw_queues synchronize_rcu call btrfs: fix wrong file range cleanup after an error filling dealloc range btrfs: fix error handling when submitting direct I/O bio PCI: Unify ACS quirk desired vs provided checking PCI: Add ACS quirk for Intel Root Complex Integrated Endpoints PCI: Generalize multi-function power dependency device links vga_switcheroo: Use device link for HDA controller vga_switcheroo: Deduplicate power state tracking PCI: Make ACS quirk implementations more uniform PCI: Add ACS quirk for Ampere root ports PCI: Add ACS quirk for iProc PAXB PCI: Avoid FLR for AMD Starship USB 3.0 PCI: Avoid FLR for AMD Matisse HD Audio & USB 3.0 PCI: Disable MSI for Freescale Layerscape PCIe RC mode ext4: fix race between ext4_sync_parent() and rename() ext4: fix error pointer dereference ext4: fix EXT_MAX_EXTENT/INDEX to check for zeroed eh_max evm: Fix possible memory leak in evm_calc_hmac_or_hash() ima: Directly assign the ima_default_policy pointer to ima_rules ima: Fix ima digest hash table key calculation mm: thp: make the THP mapcount atomic against __split_huge_pmd_locked() btrfs: send: emit file capabilities after chown string.h: fix incompatibility between FORTIFY_SOURCE and KASAN platform/x86: hp-wmi: Convert simple_strtoul() to kstrtou32() cpuidle: Fix three reference count leaks spi: dw: Return any value retrieved from the dma_transfer callback mmc: sdhci-esdhc-imx: fix the mask for tuning start point ixgbe: fix signed-integer-overflow warning mmc: via-sdmmc: Respect the cmd->busy_timeout from the mmc core staging: greybus: sdio: Respect the cmd->busy_timeout from the mmc core mmc: sdhci-msm: Set SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 quirk MIPS: Fix IRQ tracing when call handle_fpe() and handle_msa_fpe() PCI: Don't disable decoding when mmio_always_on is set macvlan: Skip loopback packets in RX handler m68k: mac: Don't call via_flush_cache() on Mac IIfx x86/mm: Stop printing BRK addresses mips: Add udelay lpj numbers adjustment mips: MAAR: Use more precise address mask x86/boot: Correct relocation destination on old linkers mwifiex: Fix memory corruption in dump_station rtlwifi: Fix a double free in _rtl_usb_tx_urb_setup() md: don't flush workqueue unconditionally in md_open net: qed: Reduce RX and TX default ring count when running inside kdump kernel wcn36xx: Fix error handling path in 'wcn36xx_probe()' nvme: refine the Qemu Identify CNS quirk kgdb: Fix spurious true from in_dbg_master() mips: cm: Fix an invalid error code of INTVN__ERR MIPS: Truncate link address into 32bit for 32bit kernel Crypto/chcr: fix for ccm(aes) failed test powerpc/spufs: fix copy_to_user while atomic net: allwinner: Fix use correct return type for ndo_start_xmit() media: cec: silence shift wrapping warning in __cec_s_log_addrs() net: lpc-enet: fix error return code in lpc_mii_init() exit: Move preemption fixup up, move blocking operations down lib/mpi: Fix 64-bit MIPS build with Clang net: bcmgenet: set Rx mode before starting netif netfilter: nft_nat: return EOPNOTSUPP if type or flags are not supported audit: fix a net reference leak in audit_list_rules_send() MIPS: Make sparse_init() using top-down allocation media: platform: fcp: Set appropriate DMA parameters media: dvb: return -EREMOTEIO on i2c transfer failure. audit: fix a net reference leak in audit_send_reply() dt-bindings: display: mediatek: control dpi pins mode to avoid leakage e1000: Distribute switch variables for initialization tools api fs: Make xxx__mountpoint() more scalable brcmfmac: fix wrong location to get firmware feature staging: android: ion: use vmap instead of vm_map_ram net: vmxnet3: fix possible buffer overflow caused by bad DMA value in vmxnet3_get_rss() x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit spi: dw: Fix Rx-only DMA transfers ARM: 8978/1: mm: make act_mm() respect THREAD_SIZE btrfs: do not ignore error from btrfs_next_leaf() when inserting checksums clocksource: dw_apb_timer_of: Fix missing clockevent timers clocksource: dw_apb_timer: Make CPU-affiliation being optional spi: dw: Enable interrupts in accordance with DMA xfer mode kgdb: Prevent infinite recursive entries to the debugger Bluetooth: Add SCO fallback for invalid LMP parameters error MIPS: Loongson: Build ATI Radeon GPU driver as module ixgbe: Fix XDP redirect on archs with PAGE_SIZE above 4K spi: dw: Zero DMA Tx and Rx configurations on stack net: ena: fix error returning in ena_com_get_hash_function() spi: pxa2xx: Apply CS clk quirk to BXT objtool: Ignore empty alternatives media: si2157: Better check for running tuner in init crypto: ccp -- don't "select" CONFIG_DMADEVICES drm: bridge: adv7511: Extend list of audio sample rates ACPI: GED: use correct trigger type field in _Exx / _Lxx handling xen/pvcalls-back: test for errors when calling backend_connect() can: kvaser_usb: kvaser_usb_leaf: Fix some info-leaks to USB devices mmc: sdio: Fix potential NULL pointer error in mmc_sdio_init_card() mmc: sdhci-msm: Clear tuning done flag while hs400 tuning agp/intel: Reinforce the barrier after GTT updates perf: Add cond_resched() to task_function_call() fat: don't allow to mount if the FAT length == 0 mm/slub: fix a memory leak in sysfs_slab_add() Smack: slab-out-of-bounds in vsscanf ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb ath9k: Fix use-after-free Write in ath9k_htc_rx_msg ath9k: Fix use-after-free Read in ath9k_wmi_ctrl_rx KVM: arm64: Make vcpu_cp1x() work on Big Endian hosts KVM: MIPS: Fix VPN2_MASK definition for variable cpu_vmbits KVM: MIPS: Define KVM_ENTRYHI_ASID to cpu_asid_mask(&boot_cpu_data) KVM: nVMX: Consult only the "basic" exit reason when routing nested exit KVM: nSVM: leave ASID aside in copy_vmcb_control_area KVM: nSVM: fix condition for filtering async PF video: fbdev: w100fb: Fix a potential double free. proc: Use new_inode not new_inode_pseudo ovl: initialize error in ovl_copy_xattr selftests/net: in rxtimestamp getopt_long needs terminating null entry crypto: virtio: Fix dest length calculation in __virtio_crypto_skcipher_do_req() crypto: virtio: Fix src/dst scatterlist calculation in __virtio_crypto_skcipher_do_req() crypto: virtio: Fix use-after-free in virtio_crypto_skcipher_finalize_req() spi: bcm2835: Fix controller unregister order spi: pxa2xx: Fix controller unregister order spi: Fix controller unregister order spi: No need to assign dummy value in spi_unregister_controller() spi: dw: Fix controller unregister order spi: dw: fix possible race condition x86/speculation: PR_SPEC_FORCE_DISABLE enforcement for indirect branches. x86/speculation: Avoid force-disabling IBPB based on STIBP and enhanced IBRS. x86/speculation: Add support for STIBP always-on preferred mode x86/speculation: Change misspelled STIPB to STIBP KVM: x86: only do L1TF workaround on affected processors KVM: x86/mmu: Consolidate "is MMIO SPTE" code kvm: x86: Fix L1TF mitigation for shadow MMU ALSA: pcm: disallow linking stream to itself crypto: cavium/nitrox - Fix 'nitrox_get_first_device()' when ndevlist is fully iterated spi: bcm-qspi: when tx/rx buffer is NULL set to 0 spi: bcm2835aux: Fix controller unregister order nilfs2: fix null pointer dereference at nilfs_segctor_do_construct() cgroup, blkcg: Prepare some symbols for module and !CONFIG_CGROUP usages ACPI: PM: Avoid using power resources if there are none for D0 ACPI: GED: add support for _Exx / _Lxx handler methods ACPI: CPPC: Fix reference count leak in acpi_cppc_processor_probe() ACPI: sysfs: Fix reference count leak in acpi_sysfs_add_hotplug_profile() ALSA: usb-audio: Fix inconsistent card PM state after resume ALSA: hda/realtek - add a pintbl quirk for several Lenovo machines ALSA: es1688: Add the missed snd_card_free() efi/efivars: Add missing kobject_put() in sysfs entry creation error path x86/reboot/quirks: Add MacBook6,1 reboot quirk x86/speculation: Prevent rogue cross-process SSBD shutdown x86/PCI: Mark Intel C620 MROMs as having non-compliant BARs x86_64: Fix jiffies ODR violation mm: add kvfree_sensitive() for freeing sensitive data objects perf probe: Accept the instance number of kretprobe event ath9k_htc: Silence undersized packet warnings powerpc/xive: Clear the page tables for the ESB IO mapping drivers/net/ibmvnic: Update VNIC protocol version reporting Input: synaptics - add a second working PNP_ID for Lenovo T470s sched/fair: Don't NUMA balance for kthreads ARM: 8977/1: ptrace: Fix mask for thumb breakpoint hook crypto: talitos - fix ECB and CBC algs ivsize serial: imx: Fix handling of TC irq in combination with DMA lib: Reduce user_access_begin() boundaries in strncpy_from_user() and strnlen_user() x86: uaccess: Inhibit speculation past access_ok() in user_access_begin() arch/openrisc: Fix issues with access_ok() Fix 'acccess_ok()' on alpha and SH make 'user_access_begin()' do 'access_ok()' vxlan: Avoid infinite loop when suppressing NS messages with invalid options ipv6: fix IPV6_ADDRFORM operation logic writeback: Drop I_DIRTY_TIME_EXPIRE writeback: Fix sync livelock due to b_dirty_time processing writeback: Avoid skipping inode writeback writeback: Protect inode->i_io_list with inode->i_lock Revert "writeback: Avoid skipping inode writeback" ANDROID: Enable LZ4_RAMDISK fscrypt: remove stale definition fs-verity: remove unnecessary extern keywords fs-verity: fix all kerneldoc warnings fscrypt: add support for IV_INO_LBLK_32 policies fscrypt: make test_dummy_encryption use v2 by default fscrypt: support test_dummy_encryption=v2 fscrypt: add fscrypt_add_test_dummy_key() linux/parser.h: add include guards fscrypt: remove unnecessary extern keywords fscrypt: name all function parameters fscrypt: fix all kerneldoc warnings ANDROID: kbuild: merge more sections with LTO Linux 4.14.184 uprobes: ensure that uprobe->offset and ->ref_ctr_offset are properly aligned iio: vcnl4000: Fix i2c swapped word reading. x86/speculation: Add Ivy Bridge to affected list x86/speculation: Add SRBDS vulnerability and mitigation documentation x86/speculation: Add Special Register Buffer Data Sampling (SRBDS) mitigation x86/cpu: Add 'table' argument to cpu_matches() x86/cpu: Add a steppings field to struct x86_cpu_id nvmem: qfprom: remove incorrect write support CDC-ACM: heed quirk also in error handling staging: rtl8712: Fix IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK tty: hvc_console, fix crashes on parallel open/close vt: keyboard: avoid signed integer overflow in k_ascii usb: musb: Fix runtime PM imbalance on error usb: musb: start session in resume for host port USB: serial: option: add Telit LE910C1-EUX compositions USB: serial: usb_wwan: do not resubmit rx urb on fatal errors USB: serial: qcserial: add DW5816e QDL support l2tp: add sk_family checks to l2tp_validate_socket net: check untrusted gso_size at kernel entry vsock: fix timeout in vsock_accept() NFC: st21nfca: add missed kfree_skb() in an error path net: usb: qmi_wwan: add Telit LE910C1-EUX composition l2tp: do not use inet_hash()/inet_unhash() devinet: fix memleak in inetdev_init() airo: Fix read overflows sending packets scsi: ufs: Release clock if DMA map fails mmc: fix compilation of user API kernel/relay.c: handle alloc_percpu returning NULL in relay_open p54usb: add AirVasT USB stick device-id HID: i2c-hid: add Schneider SCL142ALM to descriptor override HID: sony: Fix for broken buttons on DS3 USB dongles mm: Fix mremap not considering huge pmd devmap net: smsc911x: Fix runtime PM imbalance on error net: ethernet: stmmac: Enable interface clocks on probe for IPQ806x net/ethernet/freescale: rework quiesce/activate for ucc_geth net: bmac: Fix read of MAC address from ROM x86/mmiotrace: Use cpumask_available() for cpumask_var_t variables i2c: altera: Fix race between xfer_msg and isr thread ARC: [plat-eznps]: Restrict to CONFIG_ISA_ARCOMPACT ARC: Fix ICCM & DCCM runtime size checks pppoe: only process PADT targeted at local interfaces s390/ftrace: save traced function caller spi: dw: use "smp_mb()" to avoid sending spi data error scsi: hisi_sas: Check sas_port before using it libnvdimm: Fix endian conversion issues scsi: scsi_devinfo: fixup string compare ANDROID: Incremental fs: Remove dependency on PKCS7_MESSAGE_PARSER f2fs: attach IO flags to the missing cases f2fs: add node_io_flag for bio flags likewise data_io_flag f2fs: remove unused parameter of f2fs_put_rpages_mapping() f2fs: handle readonly filesystem in f2fs_ioc_shutdown() f2fs: avoid utf8_strncasecmp() with unstable name f2fs: don't return vmalloc() memory from f2fs_kmalloc() ANDROID: dm-bow: Add block_size option ANDROID: Incremental fs: Cache successful hash calculations ANDROID: Incremental fs: Fix four error-path bugs ANDROID: cuttlefish_defconfig: Disable CMOS RTC driver f2fs: fix retry logic in f2fs_write_cache_pages() ANDROID: modules: fix lockprove warning BACKPORT: arm64: vdso: Explicitly add build-id option BACKPORT: arm64: vdso: use $(LD) instead of $(CC) to link VDSO Linux 4.14.183 scsi: zfcp: fix request object use-after-free in send path causing wrong traces genirq/generic_pending: Do not lose pending affinity update net: hns: Fixes the missing put_device in positive leg for roce reset net: hns: fix unsigned comparison to less than zero KVM: VMX: check for existence of secondary exec controls before accessing rxrpc: Fix transport sockopts to get IPv4 errors on an IPv6 socket sc16is7xx: move label 'err_spi' to correct section mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap() netfilter: nf_conntrack_pptp: fix compilation warning with W=1 build bonding: Fix reference count leak in bond_sysfs_slave_add. qlcnic: fix missing release in qlcnic_83xx_interrupt_test. esp6: get the right proto for transport mode in esp6_gso_encap netfilter: nf_conntrack_pptp: prevent buffer overflows in debug code netfilter: nfnetlink_cthelper: unbreak userspace helper support netfilter: ipset: Fix subcounter update skip netfilter: nft_reject_bridge: enable reject with bridge vlan ip_vti: receive ipip packet by calling ip_tunnel_rcv vti4: eliminated some duplicate code. xfrm: fix error in comment xfrm: fix a NULL-ptr deref in xfrm_local_error xfrm: fix a warning in xfrm_policy_insert_list xfrm: call xfrm_output_gso when inner_protocol is set in xfrm_output xfrm: allow to accept packets with ipv6 NEXTHDR_HOP in xfrm_input copy_xstate_to_kernel(): don't leave parts of destination uninitialized x86/dma: Fix max PFN arithmetic overflow on 32 bit systems mac80211: mesh: fix discovery timer re-arming issue / crash parisc: Fix kernel panic in mem_init() iommu: Fix reference count leak in iommu_group_alloc. include/asm-generic/topology.h: guard cpumask_of_node() macro argument fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info() mm: remove VM_BUG_ON(PageSlab()) from page_mapcount() libceph: ignore pool overlay and cache logic on redirects ALSA: hda/realtek - Add new codec supported for ALC287 exec: Always set cap_ambient in cap_bprm_set_creds ALSA: usb-audio: mixer: volume quirk for ESS Technology Asus USB DAC ALSA: hwdep: fix a left shifting 1 by 31 UB bug RDMA/pvrdma: Fix missing pci disable in pvrdma_pci_probe() mmc: block: Fix use-after-free issue for rpmb ARM: dts: bcm2835-rpi-zero-w: Fix led polarity ARM: dts/imx6q-bx50v3: Set display interface clock parents ARM: dts: imx6q-bx50v3: Add internal switch IB/qib: Call kobject_put() when kobject_init_and_add() fails gpio: exar: Fix bad handling for ida_simple_get error path ARM: uaccess: fix DACR mismatch with nested exceptions ARM: uaccess: integrate uaccess_save and uaccess_restore ARM: uaccess: consolidate uaccess asm to asm/uaccess-asm.h ARM: 8843/1: use unified assembler in headers Input: synaptics-rmi4 - fix error return code in rmi_driver_probe() Input: synaptics-rmi4 - really fix attn_data use-after-free Input: i8042 - add ThinkPad S230u to i8042 reset list Input: dlink-dir685-touchkeys - fix a typo in driver name Input: xpad - add custom init packet for Xbox One S controllers Input: evdev - call input_flush_device() on release(), not flush() Input: usbtouchscreen - add support for BonXeon TP samples: bpf: Fix build error cifs: Fix null pointer check in cifs_read net: freescale: select CONFIG_FIXED_PHY where needed usb: gadget: legacy: fix redundant initialization warnings cachefiles: Fix race between read_waiter and read_copier involving op->to_do gfs2: move privileged user check to gfs2_quota_lock_check net: microchip: encx24j600: add missed kthread_stop gpio: tegra: mask GPIO IRQs during IRQ shutdown ARM: dts: rockchip: fix pinctrl sub nodename for spi in rk322x.dtsi arm64: dts: rockchip: swap interrupts interrupt-names rk3399 gpu node ARM: dts: rockchip: fix phy nodename for rk3228-evb net/mlx4_core: fix a memory leak bug. net: sun: fix missing release regions in cas_init_one(). net: qrtr: Fix passing invalid reference to qrtr_local_enqueue() net/mlx5e: Update netdev txq on completions during closure sctp: Start shutdown on association restart if in SHUTDOWN-SENT state and socket is closed r8152: support additional Microsoft Surface Ethernet Adapter variant net sched: fix reporting the first-time use timestamp net: revert "net: get rid of an signed integer overflow in ip_idents_reserve()" net/mlx5: Add command entry handling completion net: ipip: fix wrong address family in init error path ax25: fix setsockopt(SO_BINDTODEVICE) ANDROID: scs: fix recursive spinlock in scs_check_usage ANDROID: timer: fix timer_setup with CFI FROMGIT: USB: dummy-hcd: use configurable endpoint naming scheme UPSTREAM: USB: dummy-hcd: remove unsupported isochronous endpoints UPSTREAM: usb: raw-gadget: fix null-ptr-deref when reenabling endpoints UPSTREAM: usb: raw-gadget: documentation updates UPSTREAM: usb: raw-gadget: support stalling/halting/wedging endpoints UPSTREAM: usb: raw-gadget: fix gadget endpoint selection UPSTREAM: usb: raw-gadget: improve uapi headers comments UPSTREAM: usb: raw-gadget: fix return value of ep read ioctls UPSTREAM: usb: raw-gadget: fix raw_event_queue_fetch locking UPSTREAM: usb: raw-gadget: Fix copy_to/from_user() checks f2fs: fix wrong discard space f2fs: compress: don't compress any datas after cp stop f2fs: remove unneeded return value of __insert_discard_tree() f2fs: fix wrong value of tracepoint parameter f2fs: protect new segment allocation in expand_inode_data f2fs: code cleanup by removing ifdef macro surrounding writeback: Avoid skipping inode writeback ANDROID: net: bpf: permit redirect from ingress L3 to egress L2 devices at near max mtu Revert "ANDROID: Incremental fs: Avoid continually recalculating hashes" Linux 4.14.182 iio: adc: stm32-adc: fix device used to request dma iio: adc: stm32-adc: Use dma_request_chan() instead dma_request_slave_channel() x86/unwind/orc: Fix unwind_get_return_address_ptr() for inactive tasks rxrpc: Fix a memory leak in rxkad_verify_response() rapidio: fix an error in get_user_pages_fast() error handling mei: release me_cl object reference iio: dac: vf610: Fix an error handling path in 'vf610_dac_probe()' iio: sca3000: Remove an erroneous 'get_device()' staging: greybus: Fix uninitialized scalar variable staging: iio: ad2s1210: Fix SPI reading Revert "gfs2: Don't demote a glock until its revokes are written" cxgb4/cxgb4vf: Fix mac_hlist initialization and free cxgb4: free mac_hlist properly media: fdp1: Fix R-Car M3-N naming in debug message libnvdimm/btt: Fix LBA masking during 'free list' population libnvdimm/btt: Remove unnecessary code in btt_freelist_init ubsan: build ubsan.c more conservatively x86/uaccess, ubsan: Fix UBSAN vs. SMAP powerpc/64s: Disable STRICT_KERNEL_RWX powerpc: Remove STRICT_KERNEL_RWX incompatibility with RELOCATABLE powerpc: restore alphabetic order in Kconfig dmaengine: tegra210-adma: Fix an error handling path in 'tegra_adma_probe()' apparmor: Fix aa_label refcnt leak in policy_update ALSA: pcm: fix incorrect hw_base increase ALSA: iec1712: Initialize STDSP24 properly when using the model=staudio option l2tp: initialise PPP sessions before registering them l2tp: protect sock pointer of struct pppol2tp_session with RCU l2tp: initialise l2tp_eth sessions before registering them l2tp: don't register sessions in l2tp_session_create() arm64: fix the flush_icache_range arguments in machine_kexec padata: purge get_cpu and reorder_via_wq from padata_do_serial padata: initialize pd->cpu with effective cpumask padata: Replace delayed timer with immediate workqueue in padata_reorder padata: set cpu_index of unused CPUs to -1 ARM: futex: Address build warning platform/x86: asus-nb-wmi: Do not load on Asus T100TA and T200TA USB: core: Fix misleading driver bug report ceph: fix double unlock in handle_cap_export() gtp: set NLM_F_MULTI flag in gtp_genl_dump_pdp() x86/apic: Move TSC deadline timer debug printk scsi: ibmvscsi: Fix WARN_ON during event pool release component: Silence bind error on -EPROBE_DEFER vhost/vsock: fix packet delivery order to monitoring devices configfs: fix config_item refcnt leak in configfs_rmdir() scsi: qla2xxx: Fix hang when issuing nvme disconnect-all in NPIV HID: multitouch: add eGalaxTouch P80H84 support gcc-common.h: Update for GCC 10 ubi: Fix seq_file usage in detailed_erase_block_info debugfs file i2c: mux: demux-pinctrl: Fix an error handling path in 'i2c_demux_pinctrl_probe()' iommu/amd: Fix over-read of ACPI UID from IVRS table fix multiplication overflow in copy_fdtable() ima: Fix return value of ima_write_policy() evm: Check also if tfm is an error pointer in init_desc() ima: Set file->f_mode instead of file->f_flags in ima_calc_file_hash() padata: ensure padata_do_serial() runs on the correct CPU padata: ensure the reorder timer callback runs on the correct CPU i2c: dev: Fix the race between the release of i2c_dev and cdev watchdog: Fix the race between the release of watchdog_core_data and cdev ext4: add cond_resched() to ext4_protect_reserved_inode ANDROID: scsi: ufs: Handle clocks when lrbp fails ANDROID: fscrypt: handle direct I/O with IV_INO_LBLK_32 BACKPORT: FROMLIST: fscrypt: add support for IV_INO_LBLK_32 policies f2fs: avoid inifinite loop to wait for flushing node pages at cp_error ANDROID: namespace'ify tcp_default_init_rwnd implementation Linux 4.14.181 Makefile: disallow data races on gcc-10 as well KVM: x86: Fix off-by-one error in kvm_vcpu_ioctl_x86_setup_mce ARM: dts: r8a7740: Add missing extal2 to CPG node ARM: dts: r8a73a4: Add missing CMT1 interrupts arm64: dts: rockchip: Rename dwc3 device nodes on rk3399 to make dtc happy arm64: dts: rockchip: Replace RK805 PMIC node name with "pmic" on rk3328 boards Revert "ALSA: hda/realtek: Fix pop noise on ALC225" usb: gadget: legacy: fix error return code in cdc_bind() usb: gadget: legacy: fix error return code in gncm_bind() usb: gadget: audio: Fix a missing error return value in audio_bind() usb: gadget: net2272: Fix a memory leak in an error handling path in 'net2272_plat_probe()' clk: rockchip: fix incorrect configuration of rk3228 aclk_gpu clocks exec: Move would_dump into flush_old_exec x86/unwind/orc: Fix error handling in __unwind_start() usb: xhci: Fix NULL pointer dereference when enqueuing trbs from urb sg list USB: gadget: fix illegal array access in binding with UDC usb: host: xhci-plat: keep runtime active when removing host usb: core: hub: limit HUB_QUIRK_DISABLE_AUTOSUSPEND to USB5534B ALSA: usb-audio: Add control message quirk delay for Kingston HyperX headset x86: Fix early boot crash on gcc-10, third try ARM: dts: imx27-phytec-phycard-s-rdk: Fix the I2C1 pinctrl entries ARM: dts: dra7: Fix bus_dma_limit for PCIe ALSA: rawmidi: Fix racy buffer resize under concurrent accesses ALSA: rawmidi: Initialize allocated buffers ALSA: hda/realtek - Limit int mic boost for Thinkpad T530 net: tcp: fix rx timestamp behavior for tcp_recvmsg netprio_cgroup: Fix unlimited memory leak of v2 cgroups net: ipv4: really enforce backoff for redirects net: dsa: loop: Add module soft dependency hinic: fix a bug of ndo_stop Revert "ipv6: add mtu lock check in __ip6_rt_update_pmtu" net: phy: fix aneg restart in phy_ethtool_set_eee netlabel: cope with NULL catmap net: fix a potential recursive NETDEV_FEAT_CHANGE net: phy: micrel: Use strlcpy() for ethtool::get_strings x86/asm: Add instruction suffixes to bitops gcc-10: avoid shadowing standard library 'free()' in crypto gcc-10: disable 'restrict' warning for now gcc-10: disable 'stringop-overflow' warning for now gcc-10: disable 'array-bounds' warning for now gcc-10: disable 'zero-length-bounds' warning for now Stop the ad-hoc games with -Wno-maybe-initialized kbuild: compute false-positive -Wmaybe-uninitialized cases in Kconfig gcc-10 warnings: fix low-hanging fruit pnp: Use list_for_each_entry() instead of open coding hwmon: (da9052) Synchronize access with mfd IB/mlx4: Test return value of calls to ib_get_cached_pkey netfilter: conntrack: avoid gcc-10 zero-length-bounds warning i40iw: Fix error handling in i40iw_manage_arp_cache() pinctrl: cherryview: Add missing spinlock usage in chv_gpio_irq_handler pinctrl: baytrail: Enable pin configuration setting for GPIO chip ipmi: Fix NULL pointer dereference in ssif_probe x86/entry/64: Fix unwind hints in register clearing code ALSA: hda/realtek - Fix S3 pop noise on Dell Wyse ipc/util.c: sysvipc_find_ipc() incorrectly updates position index drm/qxl: lost qxl_bo_kunmap_atomic_page in qxl_image_init_helper() ALSA: hda/hdmi: fix race in monitor detection during probe cpufreq: intel_pstate: Only mention the BIOS disabling turbo mode once dmaengine: mmp_tdma: Reset channel error on release dmaengine: pch_dma.c: Avoid data race between probe and irq handler scsi: sg: add sg_remove_request in sg_write virtio-blk: handle block_device_operations callbacks after hot unplug drop_monitor: work around gcc-10 stringop-overflow warning net: moxa: Fix a potential double 'free_irq()' net/sonic: Fix a resource leak in an error handling path in 'jazz_sonic_probe()' shmem: fix possible deadlocks on shmlock_user_lock net: stmmac: Use mutex instead of spinlock f2fs: fix to avoid memory leakage in f2fs_listxattr f2fs: fix to avoid accessing xattr across the boundary f2fs: sanity check of xattr entry size f2fs: introduce read_xattr_block f2fs: introduce read_inline_xattr blktrace: fix dereference after null check blktrace: Protect q->blk_trace with RCU blktrace: fix trace mutex deadlock blktrace: fix unlocked access to init/start-stop/teardown net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup net: ipv6: add net argument to ip6_dst_lookup_flow scripts/decodecode: fix trapping instruction formatting objtool: Fix stack offset tracking for indirect CFAs netfilter: nat: never update the UDP checksum when it's 0 x86/unwind/orc: Fix error path for bad ORC entry type x86/unwind/orc: Prevent unwinding before ORC initialization x86/unwind/orc: Don't skip the first frame for inactive tasks x86/entry/64: Fix unwind hints in rewind_stack_do_exit() x86/entry/64: Fix unwind hints in kernel exit path batman-adv: Fix refcnt leak in batadv_v_ogm_process batman-adv: Fix refcnt leak in batadv_store_throughput_override batman-adv: Fix refcnt leak in batadv_show_throughput_override batman-adv: fix batadv_nc_random_weight_tq coredump: fix crash when umh is disabled mm/page_alloc: fix watchdog soft lockups during set_zone_contiguous() KVM: arm: vgic: Fix limit condition when writing to GICD_I[CS]ACTIVER tracing: Add a vmalloc_sync_mappings() for safe measure USB: serial: garmin_gps: add sanity checking for data length USB: uas: add quirk for LaCie 2Big Quadra HID: usbhid: Fix race between usbhid_close() and usbhid_stop() geneve: only configure or fill UDP_ZERO_CSUM6_RX/TX info when CONFIG_IPV6 HID: wacom: Read HID_DG_CONTACTMAX directly for non-generic devices ipv6: fix cleanup ordering for ip6_mr failure net: stricter validation of untrusted gso packets bnxt_en: Fix VF anti-spoof filter setup. bnxt_en: Improve AER slot reset. net/mlx5: Fix command entry leak in Internal Error State net/mlx5: Fix forced completion access non initialized command entry bnxt_en: Fix VLAN acceleration handling in bnxt_fix_features(). sch_sfq: validate silly quantum values sch_choke: avoid potential panic in choke_reset() net: usb: qmi_wwan: add support for DW5816e net/mlx4_core: Fix use of ENOSPC around mlx4_counter_alloc() net: macsec: preserve ingress frame ordering fq_codel: fix TCA_FQ_CODEL_DROP_BATCH_SIZE sanity checks dp83640: reverse arguments to list_add_tail USB: serial: qcserial: Add DW5816e support f2fs: compress: fix zstd data corruption f2fs: add compressed/gc data read IO stat f2fs: fix potential use-after-free issue f2fs: compress: don't handle non-compressed data in workqueue f2fs: remove redundant assignment to variable err f2fs: refactor resize_fs to avoid meta updates in progress f2fs: use round_up to enhance calculation f2fs: introduce F2FS_IOC_RESERVE_COMPRESS_BLOCKS f2fs: Avoid double lock for cp_rwsem during checkpoint f2fs: report delalloc reserve as non-free in statfs for project quota f2fs: Fix wrong stub helper update_sit_info f2fs: compress: let lz4 compressor handle output buffer budget properly f2fs: remove blk_plugging in block_operations f2fs: introduce F2FS_IOC_RELEASE_COMPRESS_BLOCKS f2fs: shrink spinlock coverage f2fs: correctly fix the parent inode number during fsync() f2fs: introduce mempool for {,de}compress intermediate page allocation f2fs: introduce f2fs_bmap_compress() f2fs: support fiemap on compressed inode f2fs: support partial truncation on compressed inode f2fs: remove redundant compress inode check f2fs: flush dirty meta pages when flushing them f2fs: use strcmp() in parse_options() f2fs: fix checkpoint=disable:%u%% f2fs: Use the correct style for SPDX License Identifier f2fs: rework filename handling f2fs: split f2fs_d_compare() from f2fs_match_name() f2fs: don't leak filename in f2fs_try_convert_inline_dir() ANDROID: clang: update to 11.0.1 FROMLIST: x86_64: fix jiffies ODR violation ANDROID: cuttlefish_defconfig: Enable net testing options ANDROID: Incremental fs: wake up log pollers less often ANDROID: Incremental fs: Fix scheduling while atomic error ANDROID: Incremental fs: Avoid continually recalculating hashes Revert "f2fs: refactor resize_fs to avoid meta updates in progress" UPSTREAM: HID: steam: Fix input device disappearing ANDROID: fscrypt: set dun_bytes more precisely ANDROID: dm-default-key: set dun_bytes more precisely ANDROID: block: backport the ability to specify max_dun_bytes ANDROID: hid: steam: remove BT controller matching ANDROID: dm-default-key: Update key size for wrapped keys ANDROID: cuttlefish_defconfig: Enable CONFIG_STATIC_USERMODEHELPER ANDROID: cuttlefish_defconfig: enable CONFIG_MMC_CRYPTO ANDROID: Add padding for crypto related structs in UFS and MMC ANDROID: mmc: MMC crypto API f2fs: fix missing check for f2fs_unlock_op f2fs: refactor resize_fs to avoid meta updates in progress Conflicts: Documentation/devicetree/bindings/usb/dwc3.txt drivers/block/virtio_blk.c drivers/mmc/core/Kconfig drivers/mmc/core/block.c drivers/mmc/host/sdhci-msm.c drivers/net/ethernet/stmicro/stmmac/stmmac.h drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c drivers/net/ethernet/stmicro/stmmac/stmmac_main.c drivers/scsi/ufs/ufs-qcom.c drivers/usb/gadget/composite.c drivers/usb/gadget/function/f_uac1_legacy.c fs/crypto/crypto.c fs/crypto/inline_crypt.c fs/crypto/keyring.c fs/f2fs/checkpoint.c include/linux/fs.h include/linux/mmc/host.h include/linux/mod_devicetable.h include/uapi/linux/input-event-codes.h net/qrtr/qrtr.c sound/core/compress_offload.c sound/core/rawmidi.c Fixed build errors: drivers/scsi/ufs/ufshcd.c Change-Id: I2add911b58d3c87b666ffa0fe46cbceb6cc56430 Signed-off-by: Srinivasarao P <spathi@codeaurora.org>	2020-09-06 01:12:33 +05:30
Greg Kroah-Hartman	fa6adf6dea	This is the 4.14.188 stable release -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAl8GyQEACgkQONu9yGCS aT6M6A/+KZUxvf9eqthOw08YylvhSr5LpWestSWlvBB7KVJaqSW1aKi/qCGXr+zV 5Go3J5089Zu8M2nKn/1bq2AvfugLa0+xYtCy/NkN8T/4ozB/ar/ZLMGh4LKbiDeZ Pz5pmZEajdmwNyfxqfkg5GgOfm1JTAjicnuxJZHa86L5JqkV0axC7/Crh+RPnJqc 1QiHMdrzrcYkms53EPhRIOfBuS63Y3GeNse3LW8AQpzWRME0O6qHQqD1lmj3126Y ad7VeK4s0VDHQVz0opBhyJ3yC+SSKDvjjt+78qJc7WzZJBH3YqMzTqqgU2LVkuUW ZM9YYtooyg+Nax8+c1+jEOyvyCybsd0rAGhQzzX6jBoPL07tnvbOG5zEI73lW0R7 +E3sIIgGlx8IJbHEk7Xiidkh5Eo0bBpFaLM7auGlmklYdWOjaL4rnF4QH+u/UP93 oBJoOhD1vBHmptYGr45m6oUlP0IMfxRh50jJlp3tUgOjj/BPNm9iq0OsdC2doCXd YOPiiw+q7cpxY1/XgdJH7RF04r4HZOj/t6JZ3Bd7odR7ycbO2VNSex0W3mJfIWXX T78PFcFThyXXHVBjyTPgOLFwCLPS/rKVB6018W9c3ztNb5Gq1IaXTi+YHm4Jfpb1 qjb5ZtRSQREmL80pPt8NqL1BoNvakSN50srYKk51KYmXZQ+YdWg= =5Z2k -----END PGP SIGNATURE----- Merge 4.14.188 into android-4.14-stable Changes in 4.14.188 btrfs: fix a block group ref counter leak after failure to remove block group btrfs: cow_file_range() num_bytes and disk_num_bytes are same btrfs: fix data block group relocation failure due to concurrent scrub mm: fix swap cache node allocation mask EDAC/amd64: Read back the scrub rate PCI register on F15h usbnet: smsc95xx: Fix use-after-free after removal mm/slub.c: fix corrupted freechain in deactivate_slab() mm/slub: fix stack overruns with SLUB_STATS usb: usbtest: fix missing kfree(dev->buf) in usbtest_disconnect kgdb: Avoid suspicious RCU usage warning crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock() cxgb4: use unaligned conversion for fetching timestamp cxgb4: parse TC-U32 key values and masks natively hwmon: (max6697) Make sure the OVERT mask is set correctly hwmon: (acpi_power_meter) Fix potential memory leak in acpi_power_meter_add() drm: sun4i: hdmi: Remove extra HPD polling virtio-blk: free vblk-vqs in error path of virtblk_probe() i2c: algo-pca: Add 0x78 as SCL stuck low status for PCA9665 nfsd: apply umask on fs without ACL support Revert "ALSA: usb-audio: Improve frames size computation" SMB3: Honor 'seal' flag for multiuser mounts SMB3: Honor persistent/resilient handle flags for multiuser mounts cifs: Fix the target file was deleted when rename failed. MIPS: Add missing EHB in mtc0 -> mfc0 sequence for DSPen irqchip/gic: Atomically update affinity dm zoned: assign max_io_len correctly efi: Make it possible to disable efivar_ssdt entirely Linux 4.14.188 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I048e9500ecbd19082316f125d67d22cc48bc07f2	2020-07-09 11:15:36 +02:00
Hugh Dickins	eba151dc93	mm: fix swap cache node allocation mask [ Upstream commit 243bce09c91b0145aeaedd5afba799d81841c030 ] Chris Murphy reports that a slightly overcommitted load, testing swap and zram along with i915, splats and keeps on splatting, when it had better fail less noisily: gnome-shell: page allocation failure: order:0, mode:0x400d0(__GFP_IO\|__GFP_FS\|__GFP_COMP\|__GFP_RECLAIMABLE), nodemask=(null),cpuset=/,mems_allowed=0 CPU: 2 PID: 1155 Comm: gnome-shell Not tainted 5.7.0-1.fc33.x86_64 #1 Call Trace: dump_stack+0x64/0x88 warn_alloc.cold+0x75/0xd9 __alloc_pages_slowpath.constprop.0+0xcfa/0xd30 __alloc_pages_nodemask+0x2df/0x320 alloc_slab_page+0x195/0x310 allocate_slab+0x3c5/0x440 ___slab_alloc+0x40c/0x5f0 __slab_alloc+0x1c/0x30 kmem_cache_alloc+0x20e/0x220 xas_nomem+0x28/0x70 add_to_swap_cache+0x321/0x400 __read_swap_cache_async+0x105/0x240 swap_cluster_readahead+0x22c/0x2e0 shmem_swapin+0x8e/0xc0 shmem_swapin_page+0x196/0x740 shmem_getpage_gfp+0x3a2/0xa60 shmem_read_mapping_page_gfp+0x32/0x60 shmem_get_pages+0x155/0x5e0 [i915] __i915_gem_object_get_pages+0x68/0xa0 [i915] i915_vma_pin+0x3fe/0x6c0 [i915] eb_add_vma+0x10b/0x2c0 [i915] i915_gem_do_execbuffer+0x704/0x3430 [i915] i915_gem_execbuffer2_ioctl+0x1ea/0x3e0 [i915] drm_ioctl_kernel+0x86/0xd0 [drm] drm_ioctl+0x206/0x390 [drm] ksys_ioctl+0x82/0xc0 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x5b/0xf0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported on 5.7, but it goes back really to 3.1: when shmem_read_mapping_page_gfp() was implemented for use by i915, and allowed for __GFP_NORETRY and __GFP_NOWARN flags in most places, but missed swapin's "& GFP_KERNEL" mask for page tree node allocation in __read_swap_cache_async() - that was to mask off HIGHUSER_MOVABLE bits from what page cache uses, but GFP_RECLAIM_MASK is now what's needed. Link: https://bugzilla.kernel.org/show_bug.cgi?id=208085 Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2006151330070.11064@eggly.anvils Fixes: 68da9f055755 ("tmpfs: pass gfp to shmem_getpage_gfp") Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reported-by: Chris Murphy <lists@colorremedies.com> Analyzed-by: Vlastimil Babka <vbabka@suse.cz> Analyzed-by: Matthew Wilcox <willy@infradead.org> Tested-by: Chris Murphy <lists@colorremedies.com> Cc: <stable@vger.kernel.org> [3.1+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>	2020-07-09 09:36:30 +02:00
Blagovest Kolenichev	070370f0ae	Merge android-4.14.108 (4344de2) into msm-4.14 * refs/heads/tmp-4344de2: Linux 4.14.108 s390/setup: fix boot crash for machine without EDAT-1 KVM: nVMX: Ignore limit checks on VMX instructions using flat segments KVM: nVMX: Apply addr size mask to effective address for VMX instructions KVM: nVMX: Sign extend displacements of VMX instr's mem operands KVM: x86/mmu: Do not cache MMIO accesses while memslots are in flux KVM: x86/mmu: Detect MMIO generation wrap in any address space KVM: Call kvm_arch_memslots_updated() before updating memslots drm/radeon/evergreen_cs: fix missing break in switch statement media: imx: csi: Stop upstream before disabling IDMA channel media: imx: csi: Disable CSI immediately after last EOF media: vimc: Add vimc-streamer for stream control media: uvcvideo: Avoid NULL pointer dereference at the end of streaming media: imx: prpencvf: Stop upstream before disabling IDMA channel rcu: Do RCU GP kthread self-wakeup from softirq and interrupt tpm: Unify the send callback behaviour tpm/tpm_crb: Avoid unaligned reads in crb_recv() md: Fix failed allocation of md_register_thread perf intel-pt: Fix divide by zero when TSC is not available perf intel-pt: Fix overlap calculation for padding perf auxtrace: Define auxtrace record alignment perf intel-pt: Fix CYC timestamp calculation after OVF x86/unwind/orc: Fix ORC unwind table alignment bcache: never writeback a discard operation PM / wakeup: Rework wakeup source timer cancellation NFSv4.1: Reinitialise sequence results before retransmitting a request nfsd: fix wrong check in write_v4_end_grace() nfsd: fix memory corruption caused by readdir NFS: Don't recoalesce on error in nfs_pageio_complete_mirror() NFS: Fix an I/O request leakage in nfs_do_recoalesce NFS: Fix I/O request leakages cpcap-charger: generate events for userspace dm integrity: limit the rate of error messages dm: fix to_sector() for 32bit arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2 arm64: debug: Ensure debug handlers check triggering exception level arm64: Fix HCR.TGE status for NMI contexts ARM: s3c24xx: Fix boolean expressions in osiris_dvs_notify powerpc/traps: Fix the message printed when stack overflows powerpc/traps: fix recoverability of machine check handling on book3s/32 powerpc/hugetlb: Don't do runtime allocation of 16G pages in LPAR configuration powerpc/ptrace: Simplify vr_get/set() to avoid GCC warning powerpc: Fix 32-bit KVM-PR lockup and host crash with MacOS guest powerpc/83xx: Also save/restore SPRG4-7 during suspend powerpc/powernv: Make opal log only readable by root powerpc/wii: properly disable use of BATs when requested. powerpc/32: Clear on-stack exception marker upon exception return security/selinux: fix SECURITY_LSM_NATIVE_LABELS on reused superblock jbd2: fix compile warning when using JBUFFER_TRACE jbd2: clear dirty flag when revoking a buffer from an older transaction serial: 8250_pci: Have ACCES cards that use the four port Pericom PI7C9X7954 chip use the pci_pericom_setup() serial: 8250_pci: Fix number of ports for ACCES serial cards serial: 8250_of: assume reg-shift of 2 for mrvl,mmp-uart serial: uartps: Fix stuck ISR if RX disabled with non-empty FIFO drm/i915: Relax mmap VMA check crypto: arm64/aes-neonbs - fix returning final keystream block i2c: tegra: fix maximum transfer size parport_pc: fix find_superio io compare code, should use equal test. intel_th: Don't reference unassigned outputs device property: Fix the length used in PROPERTY_ENTRY_STRING() kernel/sysctl.c: add missing range check in do_proc_dointvec_minmax_conv mm/vmalloc: fix size check for remap_vmalloc_range_partial() mm: hwpoison: fix thp split handing in soft_offline_in_use_page() nfit: acpi_nfit_ctl(): Check out_obj->type in the right place usb: chipidea: tegra: Fix missed ci_hdrc_remove_device() clk: ingenic: Fix doc of ingenic_cgu_div_info clk: ingenic: Fix round_rate misbehaving with non-integer dividers clk: clk-twl6040: Fix imprecise external abort for pdmclk clk: uniphier: Fix update register for CPU-gear ext2: Fix underflow in ext2_max_size() cxl: Wrap iterations over afu slices inside 'afu_list_lock' IB/hfi1: Close race condition on user context disable and close ext4: fix crash during online resizing ext4: add mask of ext4 flags to swap cpufreq: pxa2xx: remove incorrect __init annotation cpufreq: tegra124: add missing of_node_put() x86/kprobes: Prohibit probing on optprobe template code irqchip/gic-v3-its: Avoid parsing _indirect_ twice for Device table libertas_tf: don't set URB_ZERO_PACKET on IN USB transfer crypto: pcbc - remove bogus memcpy()s with src == dest Btrfs: fix corruption reading shared and compressed extents after hole punching btrfs: ensure that a DUP or RAID1 block group has exactly two stripes Btrfs: setup a nofs context for memory allocation at __btrfs_set_acl m68k: Add -ffreestanding to CFLAGS splice: don't merge into linked buffers fs/devpts: always delete dcache dentry-s in dput() scsi: target/iscsi: Avoid iscsit_release_commands_from_conn() deadlock scsi: sd: Optimal I/O size should be a multiple of physical block size scsi: aacraid: Fix performance issue on logical drives scsi: virtio_scsi: don't send sc payload with tmfs s390/virtio: handle find on invalid queue gracefully s390/setup: fix early warning messages clocksource/drivers/exynos_mct: Clear timer interrupt when shutdown clocksource/drivers/exynos_mct: Move one-shot check from tick clear to ISR regulator: s2mpa01: Fix step values for some LDOs regulator: max77620: Initialize values for DT properties regulator: s2mps11: Fix steps for buck7, buck8 and LDO35 spi: pxa2xx: Setup maximum supported DMA transfer length spi: ti-qspi: Fix mmap read when more than one CS in use mmc: sdhci-esdhc-imx: fix HS400 timing issue ACPI / device_sysfs: Avoid OF modalias creation for removed device xen: fix dom0 boot on huge systems tracing: Do not free iter->trace in fail path of tracing_open_pipe() tracing: Use strncpy instead of memcpy for string keys in hist triggers CIFS: Fix read after write for files with read caching CIFS: Do not reset lease state to NONE on lease break crypto: arm64/aes-ccm - fix bugs in non-NEON fallback routine crypto: arm64/aes-ccm - fix logical bug in AAD MAC handling crypto: testmgr - skip crc32c context test for ahash algorithms crypto: hash - set CRYPTO_TFM_NEED_KEY if ->setkey() fails crypto: arm64/crct10dif - revert to C code for short inputs crypto: arm/crct10dif - revert to C code for short inputs fix cgroup_do_mount() handling of failure exits libnvdimm: Fix altmap reservation size calculation libnvdimm/pmem: Honor force_raw for legacy pmem regions libnvdimm, pfn: Fix over-trim in trim_pfn_device() libnvdimm/label: Clear 'updating' flag after label-set update stm class: Prevent division by zero media: videobuf2-v4l2: drop WARN_ON in vb2_warn_zero_bytesused() tmpfs: fix uninitialized return value in shmem_link net: set static variable an initial value in atl2_probe() nfp: bpf: fix ALU32 high bits clearance bug nfp: bpf: fix code-gen bug on BPF_ALU \| BPF_XOR \| BPF_K net: thunderx: make CFG_DONE message to run through generic send-ack sequence mac80211_hwsim: propagate genlmsg_reply return code phonet: fix building with clang ARCv2: support manual regfile save on interrupts ARC: uacces: remove lp_start, lp_end from clobber list ARCv2: lib: memcpy: fix doing prefetchw outside of buffer ixgbe: fix older devices that do not support IXGBE_MRQC_L3L4TXSWEN tmpfs: fix link accounting when a tmpfile is linked in net: marvell: mvneta: fix DMA debug warning arm64: Relax GIC version check during early boot qed: Fix iWARP syn packet mac address validation. ASoC: topology: free created components in tplg load error mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush timeout issue net: mv643xx_eth: disable clk on error path in mv643xx_eth_shared_probe() qmi_wwan: apply SET_DTR quirk to Sierra WP7607 pinctrl: meson: meson8b: fix the sdxc_a data 1..3 pins net: systemport: Fix reception of BPDUs scsi: libiscsi: Fix race between iscsi_xmit_task and iscsi_complete_task keys: Fix dependency loop between construction record and auth key assoc_array: Fix shortcut creation af_key: unconditionally clone on broadcast ARM: 8824/1: fix a migrating irq bug when hotplug cpu esp: Skip TX bytes accounting when sending from a request socket clk: sunxi: A31: Fix wrong AHB gate number clk: sunxi-ng: v3s: Fix TCON reset de-assert bit Input: st-keyscan - fix potential zalloc NULL dereference auxdisplay: ht16k33: fix potential user-after-free on module unload i2c: bcm2835: Clear current buffer pointers and counts after a transfer i2c: cadence: Fix the hold bit setting net: hns: Fix object reference leaks in hns_dsaf_roce_reset() mm: page_alloc: fix ref bias in page_frag_alloc() for 1-byte allocs Revert "mm: use early_pfn_to_nid in page_ext_init" mm/gup: fix gup_pmd_range() for dax NFS: Don't use page_file_mapping after removing the page floppy: check_events callback should not return a negative number ipvs: fix dependency on nf_defrag_ipv6 mac80211: Fix Tx aggregation session tear down with ITXQs Input: matrix_keypad - use flush_delayed_work() Input: ps2-gpio - flush TX work when closing port Input: cap11xx - switch to using set_brightness_blocking() ARM: OMAP2+: fix lack of timer interrupts on CPU1 after hotplug KVM: arm/arm64: Reset the VCPU without preemption and vcpu state loaded ASoC: rsnd: fixup rsnd_ssi_master_clk_start() user count check ASoC: dapm: fix out-of-bounds accesses to DAPM lookup tables ARM: OMAP2+: Variable "reg" in function omap4_dsi_mux_pads() could be uninitialized Input: pwm-vibra - stop regulator after disabling pwm, not before Input: pwm-vibra - prevent unbalanced regulator s390/dasd: fix using offset into zero size array error gpu: ipu-v3: Fix CSI offsets for imx53 drm/imx: imx-ldb: add missing of_node_puts gpu: ipu-v3: Fix i.MX51 CSI control registers offset drm/imx: ignore plane updates on disabled crtcs crypto: rockchip - update new iv to device in multiple operations crypto: rockchip - fix scatterlist nents error crypto: ahash - fix another early termination in hash walk crypto: caam - fixed handling of sg list stm class: Fix an endless loop in channel allocation iio: adc: exynos-adc: Fix NULL pointer exception on unbind ASoC: fsl_esai: fix register setting issue in RIGHT_J mode 9p/net: fix memory leak in p9_client_create 9p: use inode->i_lock to protect i_size_write() under 32-bit FROMLIST: psi: introduce psi monitor FROMLIST: refactor header includes to allow kthread.h inclusion in psi_types.h FROMLIST: psi: track changed states FROMLIST: psi: split update_stats into parts FROMLIST: psi: rename psi fields in preparation for psi trigger addition FROMLIST: psi: make psi_enable static FROMLIST: psi: introduce state_mask to represent stalled psi states ANDROID: cuttlefish_defconfig: Enable CONFIG_INPUT_MOUSEDEV ANDROID: cuttlefish_defconfig: Enable CONFIG_PSI BACKPORT: kernel: cgroup: add poll file operation BACKPORT: fs: kernfs: add poll file operation UPSTREAM: psi: avoid divide-by-zero crash inside virtual machines UPSTREAM: psi: clarify the Kconfig text for the default-disable option UPSTREAM: psi: fix aggregation idle shut-off UPSTREAM: psi: fix reference to kernel commandline enable UPSTREAM: psi: make disabling/enabling easier for vendor kernels UPSTREAM: kernel/sched/psi.c: simplify cgroup_move_task() BACKPORT: psi: cgroup support UPSTREAM: psi: pressure stall information for CPU, memory, and IO UPSTREAM: sched: introduce this_rq_lock_irq() UPSTREAM: sched: sched.h: make rq locking and clock functions available in stats.h UPSTREAM: sched: loadavg: make calc_load_n() public BACKPORT: sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD UPSTREAM: delayacct: track delays from thrashing cache pages UPSTREAM: mm: workingset: tell cache transitions from workingset thrashing sched/fair: fix energy compute when a cluster is only a cpu core in multi-cluster system Conflicts: arch/arm/kernel/irq.c drivers/scsi/sd.c include/linux/sched.h include/uapi/linux/taskstats.h kernel/sched/Makefile sound/soc/soc-dapm.c Change-Id: I12ebb57a34da9101ee19458d7e1f96ecc769c39a Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>	2019-05-15 07:44:57 -07:00
Johannes Weiner	1d54f31271	UPSTREAM: mm: workingset: tell cache transitions from workingset thrashing Refaults happen during transitions between workingsets as well as in-place thrashing. Knowing the difference between the two has a range of applications, including measuring the impact of memory shortage on the system performance, as well as the ability to smarter balance pressure between the filesystem cache and the swap-backed workingset. During workingset transitions, inactive cache refaults and pushes out established active cache. When that active cache isn't stale, however, and also ends up refaulting, that's bonafide thrashing. Introduce a new page flag that tells on eviction whether the page has been active or not in its lifetime. This bit is then stored in the shadow entry, to classify refaults as transitioning or thrashing. How many page->flags does this leave us with on 32-bit? 20 bits are always page flags 21 if you have an MMU 23 with the zone bits for DMA, Normal, HighMem, Movable 29 with the sparsemem section bits 30 if PAE is enabled 31 with this patch. So on 32-bit PAE, that leaves 1 bit for distinguishing two NUMA nodes. If that's not enough, the system can switch to discontigmem and re-gain the 6 or 7 sparsemem section bits. Link: http://lkml.kernel.org/r/20180828172258.3185-3-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Daniel Drake <drake@endlessm.com> Tested-by: Suren Baghdasaryan <surenb@google.com> Cc: Christopher Lameter <cl@linux.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Weiner <jweiner@fb.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Enderborg <peter.enderborg@sony.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Shakeel Butt <shakeelb@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Vinayak Menon <vinmenon@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> (cherry picked from commit 8508cf3ffad4defa202b303e5b6379efc4cd9054) Bug: 127712811 Test: lmkd in PSI mode Change-Id: I71df060dce5590a3c654f9a0e8e54deeb74b64c2 Signed-off-by: Suren Baghdasaryan <surenb@google.com>	2019-03-21 16:19:55 -07:00
Laurent Dufour	4153099359	mm: protect VMA modifications using VMA sequence count The VMA sequence count has been introduced to allow fast detection of VMA modification when running a page fault handler without holding the mmap_sem. This patch provides protection against the VMA modification done in : - madvise() - mpol_rebind_policy() - vma_replace_policy() - change_prot_numa() - mlock(), munlock() - mprotect() - mmap_region() - collapse_huge_page() - userfaultd registering services In addition, VMA fields which will be read during the speculative fault path needs to be written using WRITE_ONCE to prevent write to be split and intermediate values to be pushed to other CPUs. Change-Id: Ic36046b7254e538b6baf7144c50ae577ee7f2074 Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> Patch-mainline: linux-mm @ Tue, 17 Apr 2018 16:33:15 [vinmenon@codeaurora.org: trivial merge conflict fixes] Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>	2018-06-04 15:40:51 +05:30
Minchan Kim	88484e159f	mm: swap: unify cluster-based and vma-based swap readahead This patch makes do_swap_page() not need to be aware of two different swap readahead algorithms. Just unify cluster-based and vma-based readahead function call. Change-Id: I45eeedb6347c245fbdb38744ac484119ade07d9c Link: http://lkml.kernel.org/r/1509520520-32367-3-git-send-email-minchan@kernel.org Link: http://lkml.kernel.org/r/20180220085249.151400-3-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Git-commit: 9d1b4ad90ada396540a10ab5691671aa4c229a1d Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>	2018-05-22 11:24:18 +05:30
Changbin Du	aebacdaceb	mm/swap_state.c: declare a few variables as __read_mostly These global variables are only set during initialization or rarely change, so declare them as __read_mostly. Change-Id: Iefa78448381eae5bb0e08eb7a5e0e61cc251a4b3 Link: http://lkml.kernel.org/r/1507802349-5554-1-git-send-email-changbin.du@intel.com Signed-off-by: Changbin Du <changbin.du@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Git-commit: 783cb68ee2d25d621326366c0b615bf2ccf3b402 Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>	2018-05-22 11:24:17 +05:30
Minchan Kim	909b06426e	mm: swap: clean up swap readahead When I see recent change of swap readahead, I am very unhappy about current code structure which diverges two swap readahead algorithm in do_swap_page. This patch is to clean it up. Main motivation is that fault handler doesn't need to be aware of readahead algorithms but just should call swapin_readahead. As first step, this patch cleans up a little bit but not perfect (I just separate for review easier) so next patch will make the goal complete. Change-Id: Ia5420f4deb5f02e2f3e286ee2d9008a0cff4eeb4 Link: http://lkml.kernel.org/r/1509520520-32367-2-git-send-email-minchan@kernel.org Link: http://lkml.kernel.org/r/20180220085249.151400-2-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Git-commit: f80207727aaca3aa34a9cd80659393534de69cad Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>	2018-05-22 11:24:17 +05:30
Greg Kroah-Hartman	b24413180f	License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a /uapi/ one with no licensing information in it, - file was a /uapi/ one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non /uapi/ files that summary was: SPDX license identifier # files ---------------------------------------------------\|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a /uapi/ path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------\|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the /uapi/ ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------\|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2017-11-02 11:10:55 +01:00
Huang Ying	61b639723b	mm, swap: use page-cluster as max window of VMA based swap readahead When the VMA based swap readahead was introduced, a new knob /sys/kernel/mm/swap/vma_ra_max_order was added as the max window of VMA swap readahead. This is to make it possible to use different max window for VMA based readahead and original physical readahead. But Minchan Kim pointed out that this will cause a regression because setting page-cluster sysctl to zero cannot disable swap readahead with the change. To fix the regression, the page-cluster sysctl is used as the max window of both the VMA based swap readahead and original physical swap readahead. If more fine grained control is needed in the future, more knobs can be added as the subordinate knobs of the page-cluster sysctl. The vma_ra_max_order knob is deleted. Because the knob was introduced in v4.14-rc1, and this patch is targeting being merged before v4.14 releasing, there should be no existing users of this newly added ABI. Link: http://lkml.kernel.org/r/20171011070847.16003-1-ying.huang@intel.com Fixes: ec560175c0b6fce ("mm, swap: VMA based swap readahead") Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reported-by: Minchan Kim <minchan@kernel.org> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-10-13 16:18:33 -07:00
Shaohua Li	9625456cc7	mm: fix data corruption caused by lazyfree page MADV_FREE clears pte dirty bit and then marks the page lazyfree (clear SwapBacked). There is no lock to prevent the page is added to swap cache between these two steps by page reclaim. If page reclaim finds such page, it will simply add the page to swap cache without pageout the page to swap because the page is marked as clean. Next time, page fault will read data from the swap slot which doesn't have the original data, so we have a data corruption. To fix issue, we mark the page dirty and pageout the page. However, we shouldn't dirty all pages which is clean and in swap cache. swapin page is swap cache and clean too. So we only dirty page which is added into swap cache in page reclaim, which shouldn't be swapin page. As Minchan suggested, simply dirty the page in add_to_swap can do the job. Fixes: 802a3a92ad7a ("mm: reclaim MADV_FREE pages") Link: http://lkml.kernel.org/r/08c84256b007bf3f63c91d94383bd9eb6fee2daa.1506446061.git.shli@fb.com Signed-off-by: Shaohua Li <shli@fb.com> Reported-by: Artem Savkov <asavkov@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Hillf Danton <hdanton@sina.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: <stable@vger.kernel.org> [4.12+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-10-03 17:54:25 -07:00
Huang Ying	d9bfcfdc41	mm, swap: add sysfs interface for VMA based swap readahead The sysfs interface to control the VMA based swap readahead is added as follow, /sys/kernel/mm/swap/vma_ra_enabled Enable the VMA based swap readahead algorithm, or use the original global swap readahead algorithm. /sys/kernel/mm/swap/vma_ra_max_order Set the max order of the readahead window size for the VMA based swap readahead algorithm. The corresponding ABI documentation is added too. Link: http://lkml.kernel.org/r/20170807054038.1843-5-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-09-06 17:27:29 -07:00
Huang Ying	ec560175c0	mm, swap: VMA based swap readahead The swap readahead is an important mechanism to reduce the swap in latency. Although pure sequential memory access pattern isn't very popular for anonymous memory, the space locality is still considered valid. In the original swap readahead implementation, the consecutive blocks in swap device are readahead based on the global space locality estimation. But the consecutive blocks in swap device just reflect the order of page reclaiming, don't necessarily reflect the access pattern in virtual memory. And the different tasks in the system may have different access patterns, which makes the global space locality estimation incorrect. In this patch, when page fault occurs, the virtual pages near the fault address will be readahead instead of the swap slots near the fault swap slot in swap device. This avoid to readahead the unrelated swap slots. At the same time, the swap readahead is changed to work on per-VMA from globally. So that the different access patterns of the different VMAs could be distinguished, and the different readahead policy could be applied accordingly. The original core readahead detection and scaling algorithm is reused, because it is an effect algorithm to detect the space locality. The test and result is as follow, Common test condition ===================== Test Machine: Xeon E5 v3 (2 sockets, 72 threads, 32G RAM) Swap device: NVMe disk Micro-benchmark with combined access pattern ============================================ vm-scalability, sequential swap test case, 4 processes to eat 50G virtual memory space, repeat the sequential memory writing until 300 seconds. The first round writing will trigger swap out, the following rounds will trigger sequential swap in and out. At the same time, run vm-scalability random swap test case in background, 8 processes to eat 30G virtual memory space, repeat the random memory write until 300 seconds. This will trigger random swap-in in the background. This is a combined workload with sequential and random memory accessing at the same time. The result (for sequential workload) is as follow, Base Optimized ---- --------- throughput 345413 KB/s 414029 KB/s (+19.9%) latency.average 97.14 us 61.06 us (-37.1%) latency.50th 2 us 1 us latency.60th 2 us 1 us latency.70th 98 us 2 us latency.80th 160 us 2 us latency.90th 260 us 217 us latency.95th 346 us 369 us latency.99th 1.34 ms 1.09 ms ra_hit% 52.69% 99.98% The original swap readahead algorithm is confused by the background random access workload, so readahead hit rate is lower. The VMA-base readahead algorithm works much better. Linpack ======= The test memory size is bigger than RAM to trigger swapping. Base Optimized ---- --------- elapsed_time 393.49 s 329.88 s (-16.2%) ra_hit% 86.21% 98.82% The score of base and optimized kernel hasn't visible changes. But the elapsed time reduced and readahead hit rate improved, so the optimized kernel runs better for startup and tear down stages. And the absolute value of readahead hit rate is high, shows that the space locality is still valid in some practical workloads. Link: http://lkml.kernel.org/r/20170807054038.1843-4-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-09-06 17:27:29 -07:00
Huang Ying	c4fa63092f	mm, swap: fix swap readahead marking In the original implementation, it is possible that the existing pages in the swap cache (not newly readahead) could be marked as the readahead pages. This will cause the statistics of swap readahead be wrong and influence the swap readahead algorithm too. This is fixed via marking a page as the readahead page only if it is newly allocated and read from the disk. When testing with linpack, after the fixing the swap readahead hit rate increased from ~66% to ~86%. Link: http://lkml.kernel.org/r/20170807054038.1843-3-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-09-06 17:27:29 -07:00
Huang Ying	cbc65df240	mm, swap: add swap readahead hit statistics Patch series "mm, swap: VMA based swap readahead", v4. The swap readahead is an important mechanism to reduce the swap in latency. Although pure sequential memory access pattern isn't very popular for anonymous memory, the space locality is still considered valid. In the original swap readahead implementation, the consecutive blocks in swap device are readahead based on the global space locality estimation. But the consecutive blocks in swap device just reflect the order of page reclaiming, don't necessarily reflect the access pattern in virtual memory space. And the different tasks in the system may have different access patterns, which makes the global space locality estimation incorrect. In this patchset, when page fault occurs, the virtual pages near the fault address will be readahead instead of the swap slots near the fault swap slot in swap device. This avoid to readahead the unrelated swap slots. At the same time, the swap readahead is changed to work on per-VMA from globally. So that the different access patterns of the different VMAs could be distinguished, and the different readahead policy could be applied accordingly. The original core readahead detection and scaling algorithm is reused, because it is an effect algorithm to detect the space locality. In addition to the swap readahead changes, some new sysfs interface is added to show the efficiency of the readahead algorithm and some other swap statistics. This new implementation will incur more small random read, on SSD, the improved correctness of estimation and readahead target should beat the potential increased overhead, this is also illustrated in the test results below. But on HDD, the overhead may beat the benefit, so the original implementation will be used by default. The test and result is as follow, Common test condition ===================== Test Machine: Xeon E5 v3 (2 sockets, 72 threads, 32G RAM) Swap device: NVMe disk Micro-benchmark with combined access pattern ============================================ vm-scalability, sequential swap test case, 4 processes to eat 50G virtual memory space, repeat the sequential memory writing until 300 seconds. The first round writing will trigger swap out, the following rounds will trigger sequential swap in and out. At the same time, run vm-scalability random swap test case in background, 8 processes to eat 30G virtual memory space, repeat the random memory write until 300 seconds. This will trigger random swap-in in the background. This is a combined workload with sequential and random memory accessing at the same time. The result (for sequential workload) is as follow, Base Optimized ---- --------- throughput 345413 KB/s 414029 KB/s (+19.9%) latency.average 97.14 us 61.06 us (-37.1%) latency.50th 2 us 1 us latency.60th 2 us 1 us latency.70th 98 us 2 us latency.80th 160 us 2 us latency.90th 260 us 217 us latency.95th 346 us 369 us latency.99th 1.34 ms 1.09 ms ra_hit% 52.69% 99.98% The original swap readahead algorithm is confused by the background random access workload, so readahead hit rate is lower. The VMA-base readahead algorithm works much better. Linpack ======= The test memory size is bigger than RAM to trigger swapping. Base Optimized ---- --------- elapsed_time 393.49 s 329.88 s (-16.2%) ra_hit% 86.21% 98.82% The score of base and optimized kernel hasn't visible changes. But the elapsed time reduced and readahead hit rate improved, so the optimized kernel runs better for startup and tear down stages. And the absolute value of readahead hit rate is high, shows that the space locality is still valid in some practical workloads. This patch (of 5): The statistics for total readahead pages and total readahead hits are recorded and exported via the following sysfs interface. /sys/kernel/mm/swap/ra_hits /sys/kernel/mm/swap/ra_total With them, the efficiency of the swap readahead could be measured, so that the swap readahead algorithm and parameters could be tuned accordingly. [akpm@linux-foundation.org: don't display swap stats if CONFIG_SWAP=n] Link: http://lkml.kernel.org/r/20170807054038.1843-2-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-09-06 17:27:29 -07:00
Shaohua Li	23955622ff	swap: add block io poll in swapin path For fast flash disk, async IO could introduce overhead because of context switch. block-mq now supports IO poll, which improves performance and latency a lot. swapin is a good place to use this technique, because the task is waiting for the swapin page to continue execution. In my virtual machine, directly read 4k data from a NVMe with iopoll is about 60% better than that without poll. With iopoll support in swapin patch, my microbenchmark (a task does random memory write) is about 10%~25% faster. CPU utilization increases a lot though, 2x and even 3x CPU utilization. This will depend on disk speed. While iopoll in swapin isn't intended for all usage cases, it's a win for latency sensistive workloads with high speed swap disk. block layer has knob to control poll in runtime. If poll isn't enabled in block layer, there should be no noticeable change in swapin. I got a chance to run the same test in a NVMe with DRAM as the media. In simple fio IO test, blkpoll boosts 50% performance in single thread test and ~20% in 8 threads test. So this is the base line. In above swap test, blkpoll boosts ~27% performance in single thread test. blkpoll uses 2x CPU time though. If we enable hybid polling, the performance gain has very slight drop but CPU time is only 50% worse than that without blkpoll. Also we can adjust parameter of hybid poll, with it, the CPU time penality is reduced further. In 8 threads test, blkpoll doesn't help though. The performance is similar to that without blkpoll, but cpu utilization is similar too. There is lock contention in swap path. The cpu time spending on blkpoll isn't high. So overall, blkpoll swapin isn't worse than that without it. The swapin readahead might read several pages in in the same time and form a big IO request. Since the IO will take longer time, it doesn't make sense to do poll, so the patch only does iopoll for single page swapin. [akpm@linux-foundation.org: coding-style fixes] Link: http://lkml.kernel.org/r/070c3c3e40b711e7b1390002c991e86a-b5408f0@7511894063d3764ff01ea8111f5a004d7dd700ed078797c204a24e620ddb965c Signed-off-by: Shaohua Li <shli@fb.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Jens Axboe <axboe@fb.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-07-10 16:32:30 -07:00
Minchan Kim	0f0746589e	mm, THP, swap: move anonymous THP split logic to vmscan The add_to_swap aims to allocate swap_space(ie, swap slot and swapcache) so if it fails due to lack of space in case of THP or something(hdd swap but tries THP swapout) caller rather than add_to_swap itself should split the THP page and retry it with base page which is more natural. Link: http://lkml.kernel.org/r/20170515112522.32457-4-ying.huang@intel.com Signed-off-by: Minchan Kim <minchan@kernel.org> Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com> Cc: Hugh Dickins <hughd@google.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-07-06 16:24:31 -07:00
Minchan Kim	75f6d6d29a	mm, THP, swap: unify swap slot free functions to put_swap_page Now, get_swap_page takes struct page and allocates swap space according to page size(ie, normal or THP) so it would be more cleaner to introduce put_swap_page which is a counter function of get_swap_page. Then, it calls right swap slot free function depending on page's size. [ying.huang@intel.com: minor cleanup and fix] Link: http://lkml.kernel.org/r/20170515112522.32457-3-ying.huang@intel.com Signed-off-by: Minchan Kim <minchan@kernel.org> Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com> Cc: Hugh Dickins <hughd@google.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-07-06 16:24:31 -07:00
Huang Ying	38d8b4e6bd	mm, THP, swap: delay splitting THP during swap out Patch series "THP swap: Delay splitting THP during swapping out", v11. This patchset is to optimize the performance of Transparent Huge Page (THP) swap. Recently, the performance of the storage devices improved so fast that we cannot saturate the disk bandwidth with single logical CPU when do page swap out even on a high-end server machine. Because the performance of the storage device improved faster than that of single logical CPU. And it seems that the trend will not change in the near future. On the other hand, the THP becomes more and more popular because of increased memory size. So it becomes necessary to optimize THP swap performance. The advantages of the THP swap support include: - Batch the swap operations for the THP to reduce lock acquiring/releasing, including allocating/freeing the swap space, adding/deleting to/from the swap cache, and writing/reading the swap space, etc. This will help improve the performance of the THP swap. - The THP swap space read/write will be 2M sequential IO. It is particularly helpful for the swap read, which are usually 4k random IO. This will improve the performance of the THP swap too. - It will help the memory fragmentation, especially when the THP is heavily used by the applications. The 2M continuous pages will be free up after THP swapping out. - It will improve the THP utilization on the system with the swap turned on. Because the speed for khugepaged to collapse the normal pages into the THP is quite slow. After the THP is split during the swapping out, it will take quite long time for the normal pages to collapse back into the THP after being swapped in. The high THP utilization helps the efficiency of the page based memory management too. There are some concerns regarding THP swap in, mainly because possible enlarged read/write IO size (for swap in/out) may put more overhead on the storage device. To deal with that, the THP swap in should be turned on only when necessary. For example, it can be selected via "always/never/madvise" logic, to be turned on globally, turned off globally, or turned on only for VMA with MADV_HUGEPAGE, etc. This patchset is the first step for the THP swap support. The plan is to delay splitting THP step by step, finally avoid splitting THP during the THP swapping out and swap out/in the THP as a whole. As the first step, in this patchset, the splitting huge page is delayed from almost the first step of swapping out to after allocating the swap space for the THP and adding the THP into the swap cache. This will reduce lock acquiring/releasing for the locks used for the swap cache management. With the patchset, the swap out throughput improves 15.5% (from about 3.73GB/s to about 4.31GB/s) in the vm-scalability swap-w-seq test case with 8 processes. The test is done on a Xeon E5 v3 system. The swap device used is a RAM simulated PMEM (persistent memory) device. To test the sequential swapping out, the test case creates 8 processes, which sequentially allocate and write to the anonymous pages until the RAM and part of the swap device is used up. This patch (of 5): In this patch, splitting huge page is delayed from almost the first step of swapping out to after allocating the swap space for the THP (Transparent Huge Page) and adding the THP into the swap cache. This will batch the corresponding operation, thus improve THP swap out throughput. This is the first step for the THP swap optimization. The plan is to delay splitting the THP step by step and avoid splitting the THP finally. In this patch, one swap cluster is used to hold the contents of each THP swapped out. So, the size of the swap cluster is changed to that of the THP (Transparent Huge Page) on x86_64 architecture (512). For other architectures which want such THP swap optimization, ARCH_USES_THP_SWAP_CLUSTER needs to be selected in the Kconfig file for the architecture. In effect, this will enlarge swap cluster size by 2 times on x86_64. Which may make it harder to find a free cluster when the swap space becomes fragmented. So that, this may reduce the continuous swap space allocation and sequential write in theory. The performance test in 0day shows no regressions caused by this. In the future of THP swap optimization, some information of the swapped out THP (such as compound map count) will be recorded in the swap_cluster_info data structure. The mem cgroup swap accounting functions are enhanced to support charge or uncharge a swap cluster backing a THP as a whole. The swap cluster allocate/free functions are added to allocate/free a swap cluster for a THP. A fair simple algorithm is used for swap cluster allocation, that is, only the first swap device in priority list will be tried to allocate the swap cluster. The function will fail if the trying is not successful, and the caller will fallback to allocate a single swap slot instead. This works good enough for normal cases. If the difference of the number of the free swap clusters among multiple swap devices is significant, it is possible that some THPs are split earlier than necessary. For example, this could be caused by big size difference among multiple swap devices. The swap cache functions is enhanced to support add/delete THP to/from the swap cache as a set of (HPAGE_PMD_NR) sub-pages. This may be enhanced in the future with multi-order radix tree. But because we will split the THP soon during swapping out, that optimization doesn't make much sense for this first step. The THP splitting functions are enhanced to support to split THP in swap cache during swapping out. The page lock will be held during allocating the swap cluster, adding the THP into the swap cache and splitting the THP. So in the code path other than swapping out, if the THP need to be split, the PageSwapCache(THP) will be always false. The swap cluster is only available for SSD, so the THP swap optimization in this patchset has no effect for HDD. [ying.huang@intel.com: fix two issues in THP optimize patch] Link: http://lkml.kernel.org/r/87k25ed8zo.fsf@yhuang-dev.intel.com [hannes@cmpxchg.org: extensive cleanups and simplifications, reduce code size] Link: http://lkml.kernel.org/r/20170515112522.32457-2-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Suggested-by: Andrew Morton <akpm@linux-foundation.org> [for config option] Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> [for changes in huge_memory.c and huge_mm.h] Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Shaohua Li <shli@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-07-06 16:24:31 -07:00
Huang Ying	54f180d3c1	mm, swap: use kvzalloc to allocate some swap data structures Now vzalloc() is used in swap code to allocate various data structures, such as swap cache, swap slots cache, cluster info, etc. Because the size may be too large on some system, so that normal kzalloc() may fail. But using kzalloc() has some advantages, for example, less memory fragmentation, less TLB pressure, etc. So change the data structure allocation in swap code to use kvzalloc() which will try kzalloc() firstly, and fallback to vzalloc() if kzalloc() failed. In general, although kmalloc() will reduce the number of high-order pages in short term, vmalloc() will cause more pain for memory fragmentation in the long term. And the swap data structure allocation that is changed in this patch is expected to be long term allocation. From Dave Hansen: "for example, we have a two-page data structure. vmalloc() takes two effectively random order-0 pages, probably from two different 2M pages and pins them. That "kills" two 2M pages. kmalloc(), allocating two contiguous pages, will not cross a 2M boundary. That means it will only "kill" the possibility of a single 2M page. More 2M pages == less fragmentation. The allocation in this patch occurs during swap on time, which is usually done during system boot, so usually we have high opportunity to allocate the contiguous pages successfully. The allocation for swap_map[] in struct swap_info_struct is not changed, because that is usually quite large and vmalloc_to_page() is used for it. That makes it a little harder to change. Link: http://lkml.kernel.org/r/20170407064911.25447-1-ying.huang@intel.com Signed-off-by: Huang Ying <ying.huang@intel.com> Acked-by: Tim Chen <tim.c.chen@intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Shaohua Li <shli@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-05-08 17:15:13 -07:00
Huang Ying	9c1cc2e4f2	mm, swap: fix comment in __read_swap_cache_async Commit cbab0e4eec29 ("swap: avoid read_swap_cache_async() race to deadlock while waiting on discard I/O completion") fixed a deadlock in read_swap_cache_async(). Because at that time, in swap allocation path, a swap entry may be set as SWAP_HAS_CACHE, then wait for discarding to complete before the page for the swap entry is added to the swap cache. But in commit 815c2c543d3a ("swap: make swap discard async"), the discarding for swap become asynchronous, waiting for discarding to complete will be done before the swap entry is set as SWAP_HAS_CACHE. So the comments in code is incorrect now. This patch fixes the comments. The cond_resched() added in the commit cbab0e4eec29 is not necessary now too. But if we added some sleep in swap allocation path in the future, there may be some hard to debug/reproduce deadlock bug. So it is kept. Link: http://lkml.kernel.org/r/20170317064635.12792-1-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Acked-by: Rafael Aquini <aquini@redhat.com> Cc: Shaohua Li <shli@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-05-03 15:52:10 -07:00
Huang Ying	ba81f83842	mm/swap: skip readahead only when swap slot cache is enabled Because during swap off, a swap entry may have swap_map[] == SWAP_HAS_CACHE (for example, just allocated). If we return NULL in __read_swap_cache_async(), the swap off will abort. So when swap slot cache is disabled, (for swap off), we will wait for page to be put into swap cache in such race condition. This should not be a problem for swap slot cache, because swap slot cache should be drained after clearing swap_slot_cache_enabled. [ying.huang@intel.com: fix memory leak in __read_swap_cache_async()] Link: http://lkml.kernel.org/r/874lzt6znd.fsf@yhuang-dev.intel.com Link: http://lkml.kernel.org/r/5e2c5f6abe8e6eb0797408897b1bba80938e9b9d.1484082593.git.tim.c.chen@linux.intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Cc: Aaron Lu <aaron.lu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jonathan Corbet <corbet@lwn.net> escreveu: Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-02-22 16:41:30 -08:00
Tim Chen	67afa38e01	mm/swap: add cache for swap slots allocation We add per cpu caches for swap slots that can be allocated and freed quickly without the need to touch the swap info lock. Two separate caches are maintained for swap slots allocated and swap slots returned. This is to allow the swap slots to be returned to the global pool in a batch so they will have a chance to be coaelesced with other slots in a cluster. We do not reuse the slots that are returned right away, as it may increase fragmentation of the slots. The swap allocation cache is protected by a mutex as we may sleep when searching for empty slots in cache. The swap free cache is protected by a spin lock as we cannot sleep in the free path. We refill the swap slots cache when we run out of slots, and we disable the swap slots cache and drain the slots if the global number of slots fall below a low watermark threshold. We re-enable the cache agian when the slots available are above a high watermark. [ying.huang@intel.com: use raw_cpu_ptr over this_cpu_ptr for swap slots access] [tim.c.chen@linux.intel.com: add comments on locks in swap_slots.h] Link: http://lkml.kernel.org/r/20170118180327.GA24225@linux.intel.com Link: http://lkml.kernel.org/r/35de301a4eaa8daa2977de6e987f2c154385eb66.1484082593.git.tim.c.chen@linux.intel.com Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Michal Hocko <mhocko@suse.com> Cc: Aaron Lu <aaron.lu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jonathan Corbet <corbet@lwn.net> escreveu: Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-02-22 16:41:30 -08:00
Tim Chen	e8c26ab605	mm/swap: skip readahead for unreferenced swap slots We can avoid needlessly allocating page for swap slots that are not used by anyone. No pages have to be read in for these slots. Link: http://lkml.kernel.org/r/0784b3f20b9bd3aa5552219624cb78dc4ae710c9.1484082593.git.tim.c.chen@linux.intel.com Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Aaron Lu <aaron.lu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jonathan Corbet <corbet@lwn.net> escreveu: Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-02-22 16:41:30 -08:00
Huang, Ying	4b3ef9daa4	mm/swap: split swap cache into 64MB trunks The patch is to improve the scalability of the swap out/in via using fine grained locks for the swap cache. In current kernel, one address space will be used for each swap device. And in the common configuration, the number of the swap device is very small (one is typical). This causes the heavy lock contention on the radix tree of the address space if multiple tasks swap out/in concurrently. But in fact, there is no dependency between pages in the swap cache. So that, we can split the one shared address space for each swap device into several address spaces to reduce the lock contention. In the patch, the shared address space is split into 64MB trunks. 64MB is chosen to balance the memory space usage and effect of lock contention reduction. The size of struct address_space on x86_64 architecture is 408B, so with the patch, 6528B more memory will be used for every 1GB swap space on x86_64 architecture. One address space is still shared for the swap entries in the same 64M trunks. To avoid lock contention for the first round of swap space allocation, the order of the swap clusters in the initial free clusters list is changed. The swap space distance between the consecutive swap clusters in the free cluster list is at least 64M. After the first round of allocation, the swap clusters are expected to be freed randomly, so the lock contention should be reduced effectively. Link: http://lkml.kernel.org/r/735bab895e64c930581ffb0a05b661e01da82bc5.1484082593.git.tim.c.chen@linux.intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Cc: Aaron Lu <aaron.lu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jonathan Corbet <corbet@lwn.net> escreveu: Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2017-02-22 16:41:30 -08:00
Huang Ying	f6ab1f7f6b	mm, swap: use offset of swap entry as key of swap cache This patch is to improve the performance of swap cache operations when the type of the swap device is not 0. Originally, the whole swap entry value is used as the key of the swap cache, even though there is one radix tree for each swap device. If the type of the swap device is not 0, the height of the radix tree of the swap cache will be increased unnecessary, especially on 64bit architecture. For example, for a 1GB swap device on the x86_64 architecture, the height of the radix tree of the swap cache is 11. But if the offset of the swap entry is used as the key of the swap cache, the height of the radix tree of the swap cache is 4. The increased height causes unnecessary radix tree descending and increased cache footprint. This patch reduces the height of the radix tree of the swap cache via using the offset of the swap entry instead of the whole swap entry value as the key of the swap cache. In 32 processes sequential swap out test case on a Xeon E5 v3 system with RAM disk as swap, the lock contention for the spinlock of the swap cache is reduced from 20.15% to 12.19%, when the type of the swap device is 1. Use the whole swap entry as key, perf-profile.calltrace.cycles-pp._raw_spin_lock_irq.__add_to_swap_cache.add_to_swap_cache.add_to_swap.shrink_page_list: 10.37, perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__remove_mapping.shrink_page_list.shrink_inactive_list.shrink_node_memcg: 9.78, Use the swap offset as key, perf-profile.calltrace.cycles-pp._raw_spin_lock_irq.__add_to_swap_cache.add_to_swap_cache.add_to_swap.shrink_page_list: 6.25, perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.__remove_mapping.shrink_page_list.shrink_inactive_list.shrink_node_memcg: 5.94, Link: http://lkml.kernel.org/r/1473270649-27229-1-git-send-email-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Hugh Dickins <hughd@google.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Minchan Kim <minchan@kernel.org> Cc: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-10-07 18:46:28 -07:00
Aaron Lu	6fcb52a56f	thp: reduce usage of huge zero page's atomic counter The global zero page is used to satisfy an anonymous read fault. If THP(Transparent HugePage) is enabled then the global huge zero page is used. The global huge zero page uses an atomic counter for reference counting and is allocated/freed dynamically according to its counter value. CPU time spent on that counter will greatly increase if there are a lot of processes doing anonymous read faults. This patch proposes a way to reduce the access to the global counter so that the CPU load can be reduced accordingly. To do this, a new flag of the mm_struct is introduced: MMF_USED_HUGE_ZERO_PAGE. With this flag, the process only need to touch the global counter in two cases: 1 The first time it uses the global huge zero page; 2 The time when mm_user of its mm_struct reaches zero. Note that right now, the huge zero page is eligible to be freed as soon as its last use goes away. With this patch, the page will not be eligible to be freed until the exit of the last process from which it was ever used. And with the use of mm_user, the kthread is not eligible to use huge zero page either. Since no kthread is using huge zero page today, there is no difference after applying this patch. But if that is not desired, I can change it to when mm_count reaches zero. Case used for test on Haswell EP: usemem -n 72 --readonly -j 0x200000 100G Which spawns 72 processes and each will mmap 100G anonymous space and then do read only access to that space sequentially with a step of 2MB. CPU cycles from perf report for base commit: 54.03% usemem [kernel.kallsyms] [k] get_huge_zero_page CPU cycles from perf report for this commit: 0.11% usemem [kernel.kallsyms] [k] mm_get_huge_zero_page Performance(throughput) of the workload for base commit: 1784430792 Performance(throughput) of the workload for this commit: 4726928591 164% increase. Runtime of the workload for base commit: 707592 us Runtime of the workload for this commit: 303970 us 50% drop. Link: http://lkml.kernel.org/r/fe51a88f-446a-4622-1363-ad1282d71385@intel.com Signed-off-by: Aaron Lu <aaron.lu@intel.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Tim Chen <tim.c.chen@linux.intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-10-07 18:46:28 -07:00
Huang Ying	371a096edf	mm: don't use radix tree writeback tags for pages in swap cache File pages use a set of radix tree tags (DIRTY, TOWRITE, WRITEBACK, etc.) to accelerate finding the pages with a specific tag in the radix tree during inode writeback. But for anonymous pages in the swap cache, there is no inode writeback. So there is no need to find the pages with some writeback tags in the radix tree. It is not necessary to touch radix tree writeback tags for pages in the swap cache. Per Rik van Riel's suggestion, a new flag AS_NO_WRITEBACK_TAGS is introduced for address spaces which don't need to update the writeback tags. The flag is set for swap caches. It may be used for DAX file systems, etc. With this patch, the swap out bandwidth improved 22.3% (from ~1.2GB/s to ~1.48GBps) in the vm-scalability swap-w-seq test case with 8 processes. The test is done on a Xeon E5 v3 system. The swap device used is a RAM simulated PMEM (persistent memory) device. The improvement comes from the reduced contention on the swap cache radix tree lock. To test sequential swapping out, the test case uses 8 processes, which sequentially allocate and write to the anonymous pages until RAM and part of the swap device is used up. Details of comparison is as follow, base base+patch ---------------- -------------------------- %stddev %change %stddev \ \| \ 2506952 Â± 2% +28.1% 3212076 Â± 7% vm-scalability.throughput 1207402 Â± 7% +22.3% 1476578 Â± 6% vmstat.swap.so 10.86 Â± 12% -23.4% 8.31 Â± 16% perf-profile.cycles-pp._raw_spin_lock_irq.__add_to_swap_cache.add_to_swap_cache.add_to_swap.shrink_page_list 10.82 Â± 13% -33.1% 7.24 Â± 14% perf-profile.cycles-pp._raw_spin_lock_irqsave.__remove_mapping.shrink_page_list.shrink_inactive_list.shrink_zone_memcg 10.36 Â± 11% -100.0% 0.00 Â± -1% perf-profile.cycles-pp._raw_spin_lock_irqsave.__test_set_page_writeback.bdev_write_page.__swap_writepage.swap_writepage 10.52 Â± 12% -100.0% 0.00 Â± -1% perf-profile.cycles-pp._raw_spin_lock_irqsave.test_clear_page_writeback.end_page_writeback.page_endio.pmem_rw_page Link: http://lkml.kernel.org/r/1472578089-5560-1-git-send-email-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Shaohua Li <shli@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Tejun Heo <tj@kernel.org> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-10-07 18:46:28 -07:00
Mel Gorman	11fb998986	mm: move most file-based accounting to the node There are now a number of accounting oddities such as mapped file pages being accounted for on the node while the total number of file pages are accounted on the zone. This can be coped with to some extent but it's confusing so this patch moves the relevant file-based accounted. Due to throttling logic in the page allocator for reliable OOM detection, it is still necessary to track dirty and writeback pages on a per-zone basis. [mgorman@techsingularity.net: fix NR_ZONE_WRITE_PENDING accounting] Link: http://lkml.kernel.org/r/1468404004-5085-5-git-send-email-mgorman@techsingularity.net Link: http://lkml.kernel.org/r/1467970510-21195-20-git-send-email-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Rik van Riel <riel@surriel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-07-28 16:07:41 -07:00
Gerald Schaefer	770a537022	mm: thp: broken page count after commit aa88b68c3b1d Christian Borntraeger reported a kernel panic after corrupt page counts, and it turned out to be a regression introduced with commit aa88b68c3b1d ("thp: keep huge zero page pinned until tlb flush"), at least on s390. put_huge_zero_page() was moved over from zap_huge_pmd() to release_pages(), and it was replaced by tlb_remove_page(). However, release_pages() might not always be triggered by (the arch-specific) tlb_remove_page(). On s390 we call free_page_and_swap_cache() from tlb_remove_page(), and not tlb_flush_mmu() -> free_pages_and_swap_cache() like the generic version, because we don't use the MMU-gather logic. Although both functions have very similar names, they are doing very unsimilar things, in particular free_page_xxx is just doing a put_page(), while free_pages_xxx calls release_pages(). This of course results in very harmful put_page()s on the huge zero page, on architectures where tlb_remove_page() is implemented in this way. It seems to affect only s390 and sh, but sh doesn't have THP support, so the problem (currently) probably only exists on s390. The following quick hack fixed the issue: Link: http://lkml.kernel.org/r/20160602172141.75c006a9@thinkpad Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: <stable@vger.kernel.org> [4.6.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-06-09 14:23:11 -07:00
Hugh Dickins	fa9949da59	mm: use __SetPageSwapBacked and dont ClearPageSwapBacked v3.16 commit 07a427884348 ("mm: shmem: avoid atomic operation during shmem_getpage_gfp") rightly replaced one instance of SetPageSwapBacked by __SetPageSwapBacked, pointing out that the newly allocated page is not yet visible to other users (except speculative get_page_unless_zero- ers, who may not update page flags before their further checks). That was part of a series in which Mel was focused on tmpfs profiles: but almost all SetPageSwapBacked uses can be so optimized, with the same justification. Remove ClearPageSwapBacked from __read_swap_cache_async() error path: it's not an error to free a page with PG_swapbacked set. Follow a convention of __SetPageLocked, __SetPageSwapBacked instead of doing it differently in different places; but that's for tidiness - if the ordering actually mattered, we should not be using the __variants. There's probably scope for further __SetPageFlags in other places, but SwapBacked is the one I'm interested in at the moment. Signed-off-by: Hugh Dickins <hughd@google.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Andres Lagar-Cavilla <andreslc@google.com> Cc: Yang Shi <yang.shi@linaro.org> Cc: Ning Qu <quning@gmail.com> Reviewed-by: Mel Gorman <mgorman@techsingularity.net> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-05-19 19:12:14 -07:00
Kirill A. Shutemov	09cbfeaf1a	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced long time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-04-04 10:41:08 -07:00
Vladimir Davydov	37e8435119	mm: memcontrol: charge swap to cgroup2 This patchset introduces swap accounting to cgroup2. This patch (of 7): In the legacy hierarchy we charge memsw, which is dubious, because: - memsw.limit must be >= memory.limit, so it is impossible to limit swap usage less than memory usage. Taking into account the fact that the primary limiting mechanism in the unified hierarchy is memory.high while memory.limit is either left unset or set to a very large value, moving memsw.limit knob to the unified hierarchy would effectively make it impossible to limit swap usage according to the user preference. - memsw.usage != memory.usage + swap.usage, because a page occupying both swap entry and a swap cache page is charged only once to memsw counter. As a result, it is possible to effectively eat up to memory.limit of memory pages and memsw.limit of swap entries, which looks unexpected. That said, we should provide a different swap limiting mechanism for cgroup2. This patch adds mem_cgroup->swap counter, which charges the actual number of swap entries used by a cgroup. It is only charged in the unified hierarchy, while the legacy hierarchy memsw logic is left intact. The swap usage can be monitored using new memory.swap.current file and limited using memory.swap.max. Note, to charge swap resource properly in the unified hierarchy, we have to make swap_entry_free uncharge swap only when ->usage reaches zero, not just ->count, i.e. when all references to a swap entry, including the one taken by swap cache, are gone. This is necessary, because otherwise swap-in could result in uncharging swap even if the page is still in swap cache and hence still occupies a swap entry. At the same time, this shouldn't break memsw counter logic, where a page is never charged twice for using both memory and swap, because in case of legacy hierarchy we uncharge swap on commit (see mem_cgroup_commit_charge). Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-01-20 17:09:18 -08:00
Minchan Kim	854e9ed09d	mm: support madvise(MADV_FREE) Linux doesn't have an ability to free pages lazy while other OS already have been supported that named by madvise(MADV_FREE). The gain is clear that kernel can discard freed pages rather than swapping out or OOM if memory pressure happens. Without memory pressure, freed pages would be reused by userspace without another additional overhead(ex, page fault + allocation + zeroing). Jason Evans said: : Facebook has been using MAP_UNINITIALIZED : (https://lkml.org/lkml/2012/1/18/308) in some of its applications for : several years, but there are operational costs to maintaining this : out-of-tree in our kernel and in jemalloc, and we are anxious to retire it : in favor of MADV_FREE. When we first enabled MAP_UNINITIALIZED it : increased throughput for much of our workload by ~5%, and although the : benefit has decreased using newer hardware and kernels, there is still : enough benefit that we cannot reasonably retire it without a replacement. : : Aside from Facebook operations, there are numerous broadly used : applications that would benefit from MADV_FREE. The ones that immediately : come to mind are redis, varnish, and MariaDB. I don't have much insight : into Android internals and development process, but I would hope to see : MADV_FREE support eventually end up there as well to benefit applications : linked with the integrated jemalloc. : : jemalloc will use MADV_FREE once it becomes available in the Linux kernel. : In fact, jemalloc already uses MADV_FREE or equivalent everywhere it's : available: BSD, OS X, Windows, and Solaris -- every platform except Linux : (and AIX, but I'm not sure it even compiles on AIX). The lack of : MADV_FREE on Linux forced me down a long series of increasingly : sophisticated heuristics for madvise() volume reduction, and even so this : remains a common performance issue for people using jemalloc on Linux. : Please integrate MADV_FREE; many people will benefit substantially. How it works: When madvise syscall is called, VM clears dirty bit of ptes of the range. If memory pressure happens, VM checks dirty bit of page table and if it found still "clean", it means it's a "lazyfree pages" so VM could discard the page instead of swapping out. Once there was store operation for the page before VM peek a page to reclaim, dirty bit is set so VM can swap out the page instead of discarding. One thing we should notice is that basically, MADV_FREE relies on dirty bit in page table entry to decide whether VM allows to discard the page or not. IOW, if page table entry includes marked dirty bit, VM shouldn't discard the page. However, as a example, if swap-in by read fault happens, page table entry doesn't have dirty bit so MADV_FREE could discard the page wrongly. For avoiding the problem, MADV_FREE did more checks with PageDirty and PageSwapCache. It worked out because swapped-in page lives on swap cache and since it is evicted from the swap cache, the page has PG_dirty flag. So both page flags check effectively prevent wrong discarding by MADV_FREE. However, a problem in above logic is that swapped-in page has PG_dirty still after they are removed from swap cache so VM cannot consider the page as freeable any more even if madvise_free is called in future. Look at below example for detail. ptr = malloc(); memset(ptr); .. .. .. heavy memory pressure so all of pages are swapped out .. .. var = ptr; -> a page swapped-in and could be removed from swapcache. Then, page table doesn't mark dirty bit and page descriptor includes PG_dirty .. .. madvise_free(ptr); -> It doesn't clear PG_dirty of the page. .. .. .. .. heavy memory pressure again. .. In this time, VM cannot discard the page because the page .. has PG_dirty To solve the problem, this patch clears PG_dirty if only the page is owned exclusively by current process when madvise is called because PG_dirty represents ptes's dirtiness in several processes so we could clear it only if we own it exclusively. Firstly, heavy users would be general allocators(ex, jemalloc, tcmalloc and hope glibc supports it) and jemalloc/tcmalloc already have supported the feature for other OS(ex, FreeBSD) barrios@blaptop:~/benchmark/ebizzy$ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 12 On-line CPU(s) list: 0-11 Thread(s) per core: 1 Core(s) per socket: 1 Socket(s): 12 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 2 Stepping: 3 CPU MHz: 3200.185 BogoMIPS: 6400.53 Virtualization: VT-x Hypervisor vendor: KVM Virtualization type: full L1d cache: 32K L1i cache: 32K L2 cache: 4096K NUMA node0 CPU(s): 0-11 ebizzy benchmark(./ebizzy -S 10 -n 512) Higher avg is better. vanilla-jemalloc MADV_free-jemalloc 1 thread records: 10 records: 10 avg: 2961.90 avg: 12069.70 std: 71.96(2.43%) std: 186.68(1.55%) max: 3070.00 max: 12385.00 min: 2796.00 min: 11746.00 2 thread records: 10 records: 10 avg: 5020.00 avg: 17827.00 std: 264.87(5.28%) std: 358.52(2.01%) max: 5244.00 max: 18760.00 min: 4251.00 min: 17382.00 4 thread records: 10 records: 10 avg: 8988.80 avg: 27930.80 std: 1175.33(13.08%) std: 3317.33(11.88%) max: 9508.00 max: 30879.00 min: 5477.00 min: 21024.00 8 thread records: 10 records: 10 avg: 13036.50 avg: 33739.40 std: 170.67(1.31%) std: 5146.22(15.25%) max: 13371.00 max: 40572.00 min: 12785.00 min: 24088.00 16 thread records: 10 records: 10 avg: 11092.40 avg: 31424.20 std: 710.60(6.41%) std: 3763.89(11.98%) max: 12446.00 max: 36635.00 min: 9949.00 min: 25669.00 32 thread records: 10 records: 10 avg: 11067.00 avg: 34495.80 std: 971.06(8.77%) std: 2721.36(7.89%) max: 12010.00 max: 38598.00 min: 9002.00 min: 30636.00 In summary, MADV_FREE is about much faster than MADV_DONTNEED. This patch (of 12): Add core MADV_FREE implementation. [akpm@linux-foundation.org: small cleanups] Signed-off-by: Minchan Kim <minchan@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Hugh Dickins <hughd@google.com> Cc: Mika Penttil <mika.penttila@nextfour.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Jason Evans <je@fb.com> Cc: Daniel Micay <danielmicay@gmail.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Shaohua Li <shli@kernel.org> Cc: <yalin.wang2010@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: "Shaohua Li" <shli@kernel.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chen Gang <gang.chen.5i5j@gmail.com> Cc: Chris Zankel <chris@zankel.net> Cc: Darrick J. Wong <darrick.wong@oracle.com> Cc: David S. Miller <davem@davemloft.net> Cc: Helge Deller <deller@gmx.de> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Roland Dreier <roland@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Shaohua Li <shli@kernel.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-01-15 17:56:32 -08:00
Kirill A. Shutemov	48c935ad88	page-flags: define PG_locked behavior on compound pages lock_page() must operate on the whole compound page. It doesn't make much sense to lock part of compound page. Change code to use head page's PG_locked, if tail page is passed. This patch also gets rid of custom helper functions -- __set_page_locked() and __clear_page_locked(). They are replaced with helpers generated by __SETPAGEFLAG/__CLEARPAGEFLAG. Tail pages to these helper would trigger VM_BUG_ON(). SLUB uses PG_locked as a bit spin locked. IIUC, tail pages should never appear there. VM_BUG_ON() is added to make sure that this assumption is correct. [akpm@linux-foundation.org: fix fs/cifs/file.c] Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Steve Capper <steve.capper@linaro.org> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Jérôme Glisse <jglisse@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2016-01-15 17:56:32 -08:00
Dmitry Safonov	5b999aadba	mm: swap: zswap: maybe_preload & refactoring zswap_get_swap_cache_page and read_swap_cache_async have pretty much the same code with only significant difference in return value and usage of swap_readpage. I a helper __read_swap_cache_async() with the common code. Behavior change: now zswap_get_swap_cache_page will use radix_tree_maybe_preload instead radix_tree_preload. Looks like, this wasn't changed only by the reason of code duplication. Signed-off-by: Dmitry Safonov <0x7f454c46@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Hugh Dickins <hughd@google.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <axboe@fb.com> Cc: Christoph Hellwig <hch@lst.de> Cc: David Herrmann <dh.herrmann@gmail.com> Cc: Seth Jennings <sjennings@variantweb.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2015-09-08 15:35:28 -07:00
Jason Low	4db0c3c298	mm: remove rest of ACCESS_ONCE() usages We converted some of the usages of ACCESS_ONCE to READ_ONCE in the mm/ tree since it doesn't work reliably on non-scalar types. This patch removes the rest of the usages of ACCESS_ONCE, and use the new READ_ONCE API for the read accesses. This makes things cleaner, instead of using separate/multiple sets of APIs. Signed-off-by: Jason Low <jason.low2@hp.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Davidlohr Bueso <dave@stgolabs.net> Acked-by: Rik van Riel <riel@redhat.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2015-04-15 16:35:18 -07:00
Christoph Hellwig	b83ae6d421	fs: remove mapping->backing_dev_info Now that we never use the backing_dev_info pointer in struct address_space we can simply remove it and save 4 to 8 bytes in every inode. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Reviewed-by: Tejun Heo <tj@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>	2015-01-20 14:03:05 -07:00
Christoph Hellwig	97b713ba3e	fs: kill BDI_CAP_SWAP_BACKED This bdi flag isn't too useful - we can determine that a vma is backed by either swap or shmem trivially in the caller. This also allows removing the backing_dev_info instaces for swap and shmem in favor of noop_backing_dev_info. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Tejun Heo <tj@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>	2015-01-20 14:02:56 -07:00
Johannes Weiner	5d1ea48bdd	mm: page_cgroup: rename file to mm/swap_cgroup.c Now that the external page_cgroup data structure and its lookup is gone, the only code remaining in there is swap slot accounting. Rename it and move the conditional compilation into mm/Makefile. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Vladimir Davydov <vdavydov@parallels.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Tejun Heo <tj@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2014-12-10 17:41:09 -08:00
Michal Hocko	aabfb57296	mm: memcontrol: do not kill uncharge batching in free_pages_and_swap_cache free_pages_and_swap_cache limits release_pages to PAGEVEC_SIZE chunks. This is not a big deal for the normal release path but it completely kills memcg uncharge batching which reduces res_counter spin_lock contention. Dave has noticed this with his page fault scalability test case on a large machine when the lock was basically dominating on all CPUs: 80.18% 80.18% [kernel] [k] _raw_spin_lock \| --- _raw_spin_lock \| \|--66.59%-- res_counter_uncharge_until \| res_counter_uncharge \| uncharge_batch \| uncharge_list \| mem_cgroup_uncharge_list \| release_pages \| free_pages_and_swap_cache \| tlb_flush_mmu_free \| \| \| \|--90.12%-- unmap_single_vma \| \| unmap_vmas \| \| unmap_region \| \| do_munmap \| \| vm_munmap \| \| sys_munmap \| \| system_call_fastpath \| \| __GI___munmap \| \| \| --9.88%-- tlb_flush_mmu \| tlb_finish_mmu \| unmap_region \| do_munmap \| vm_munmap \| sys_munmap \| system_call_fastpath \| __GI___munmap In his case the load was running in the root memcg and that part has been handled by reverting 05b843012335 ("mm: memcontrol: use root_mem_cgroup res_counter") because this is a clear regression, but the problem remains inside dedicated memcgs. There is no reason to limit release_pages to PAGEVEC_SIZE batches other than lru_lock held times. This logic, however, can be moved inside the function. mem_cgroup_uncharge_list and free_hot_cold_page_list do not hold any lock for the whole pages_to_free list so it is safe to call them in a single run. The release_pages() code was previously breaking the lru_lock each PAGEVEC_SIZE pages (ie, 14 pages). However this code has no usage of pagevecs so switch to breaking the lock at least every SWAP_CLUSTER_MAX (32) pages. This means that the lock acquisition frequency is approximately halved and the max hold times are approximately doubled. The now unneeded batching is removed from free_pages_and_swap_cache(). Also update the grossly out-of-date release_pages documentation. Signed-off-by: Michal Hocko <mhocko@suse.cz> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reported-by: Dave Hansen <dave@sr71.net> Cc: Vladimir Davydov <vdavydov@parallels.com> Cc: Greg Thelen <gthelen@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2014-10-09 22:25:59 -04:00
Andrew Morton	1c93923cc2	include/linux/migrate.h: remove migrate_page #define This is designed to avoid a few ifdefs in .c files but it's obnoxious because it can cause unsuspecting "migrate_page" symbols to get turned into "NULL". Just nuke it and use the ifdefs. Cc: Konstantin Khlebnikov <k.khlebnikov@samsung.com> Cc: Rafael Aquini <aquini@redhat.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2014-10-09 22:25:56 -04:00
David Herrmann	4bb5f5d939	mm: allow drivers to prevent new writable mappings This patch (of 6): The i_mmap_writable field counts existing writable mappings of an address_space. To allow drivers to prevent new writable mappings, make this counter signed and prevent new writable mappings if it is negative. This is modelled after i_writecount and DENYWRITE. This will be required by the shmem-sealing infrastructure to prevent any new writable mappings after the WRITE seal has been set. In case there exists a writable mapping, this operation will fail with EBUSY. Note that we rely on the fact that iff you already own a writable mapping, you can increase the counter without using the helpers. This is the same that we do for i_writecount. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Acked-by: Hugh Dickins <hughd@google.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Ryan Lortie <desrt@desrt.ca> Cc: Lennart Poettering <lennart@poettering.net> Cc: Daniel Mack <zonque@gmail.com> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2014-08-08 15:57:31 -07:00
Johannes Weiner	0a31bc97c8	mm: memcontrol: rewrite uncharge API The memcg uncharging code that is involved towards the end of a page's lifetime - truncation, reclaim, swapout, migration - is impressively complicated and fragile. Because anonymous and file pages were always charged before they had their page->mapping established, uncharges had to happen when the page type could still be known from the context; as in unmap for anonymous, page cache removal for file and shmem pages, and swap cache truncation for swap pages. However, these operations happen well before the page is actually freed, and so a lot of synchronization is necessary: - Charging, uncharging, page migration, and charge migration all need to take a per-page bit spinlock as they could race with uncharging. - Swap cache truncation happens during both swap-in and swap-out, and possibly repeatedly before the page is actually freed. This means that the memcg swapout code is called from many contexts that make no sense and it has to figure out the direction from page state to make sure memory and memory+swap are always correctly charged. - On page migration, the old page might be unmapped but then reused, so memcg code has to prevent untimely uncharging in that case. Because this code - which should be a simple charge transfer - is so special-cased, it is not reusable for replace_page_cache(). But now that charged pages always have a page->mapping, introduce mem_cgroup_uncharge(), which is called after the final put_page(), when we know for sure that nobody is looking at the page anymore. For page migration, introduce mem_cgroup_migrate(), which is called after the migration is successful and the new page is fully rmapped. Because the old page is no longer uncharged after migration, prevent double charges by decoupling the page's memcg association (PCG_USED and pc->mem_cgroup) from the page holding an actual charge. The new bits PCG_MEM and PCG_MEMSW represent the respective charges and are transferred to the new page during migration. mem_cgroup_migrate() is suitable for replace_page_cache() as well, which gets rid of mem_cgroup_replace_page_cache(). However, care needs to be taken because both the source and the target page can already be charged and on the LRU when fuse is splicing: grab the page lock on the charge moving side to prevent changing pc->mem_cgroup of a page under migration. Also, the lruvecs of both pages change as we uncharge the old and charge the new during migration, and putback may race with us, so grab the lru lock and isolate the pages iff on LRU to prevent races and ensure the pages are on the right lruvec afterward. Swap accounting is massively simplified: because the page is no longer uncharged as early as swap cache deletion, a new mem_cgroup_swapout() can transfer the page's memory+swap charge (PCG_MEMSW) to the swap entry before the final put_page() in page reclaim. Finally, page_cgroup changes are now protected by whatever protection the page itself offers: anonymous pages are charged under the page table lock, whereas page cache insertions, swapin, and migration hold the page lock. Uncharging happens under full exclusion with no outstanding references. Charging and uncharging also ensure that the page is off-LRU, which serializes against charge migration. Remove the very costly page_cgroup lock and set pc->flags non-atomically. [mhocko@suse.cz: mem_cgroup_charge_statistics needs preempt_disable] [vdavydov@parallels.com: fix flags definition] Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Hugh Dickins <hughd@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Vladimir Davydov <vdavydov@parallels.com> Tested-by: Jet Chen <jet.chen@intel.com> Acked-by: Michal Hocko <mhocko@suse.cz> Tested-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2014-08-08 15:57:17 -07:00
Mel Gorman	b745bc85f2	mm: page_alloc: convert hot/cold parameter and immediate callers to bool cold is a bool, make it one. Make the likely case the "if" part of the block instead of the else as according to the optimisation manual this is preferred. Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Rik van Riel <riel@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Jan Kara <jack@suse.cz> Cc: Michal Hocko <mhocko@suse.cz> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2014-06-04 16:54:09 -07:00
Shaohua Li	579f82901f	swap: add a simple detector for inappropriate swapin readahead This is a patch to improve swap readahead algorithm. It's from Hugh and I slightly changed it. Hugh's original changelog: swapin readahead does a blind readahead, whether or not the swapin is sequential. This may be ok on harddisk, because large reads have relatively small costs, and if the readahead pages are unneeded they can be reclaimed easily - though, what if their allocation forced reclaim of useful pages? But on SSD devices large reads are more expensive than small ones: if the readahead pages are unneeded, reading them in caused significant overhead. This patch adds very simplistic random read detection. Stealing the PageReadahead technique from Konstantin Khlebnikov's patch, avoiding the vma/anon_vma sophistications of Shaohua Li's patch, swapin_nr_pages() simply looks at readahead's current success rate, and narrows or widens its readahead window accordingly. There is little science to its heuristic: it's about as stupid as can be whilst remaining effective. The table below shows elapsed times (in centiseconds) when running a single repetitive swapping load across a 1000MB mapping in 900MB ram with 1GB swap (the harddisk tests had taken painfully too long when I used mem=500M, but SSD shows similar results for that). Vanilla is the 3.6-rc7 kernel on which I started; Shaohua denotes his Sep 3 patch in mmotm and linux-next; HughOld denotes my Oct 1 patch which Shaohua showed to be defective; HughNew this Nov 14 patch, with page_cluster as usual at default of 3 (8-page reads); HughPC4 this same patch with page_cluster 4 (16-page reads); HughPC0 with page_cluster 0 (1-page reads: no readahead). HDD for swapping to harddisk, SSD for swapping to VertexII SSD. Seq for sequential access to the mapping, cycling five times around; Rand for the same number of random touches. Anon for a MAP_PRIVATE anon mapping; Shmem for a MAP_SHARED anon mapping, equivalent to tmpfs. One weakness of Shaohua's vma/anon_vma approach was that it did not optimize Shmem: seen below. Konstantin's approach was perhaps mistuned, 50% slower on Seq: did not compete and is not shown below. HDD Vanilla Shaohua HughOld HughNew HughPC4 HughPC0 Seq Anon 73921 76210 75611 76904 78191 121542 Seq Shmem 73601 73176 73855 72947 74543 118322 Rand Anon 895392 831243 871569 845197 846496 841680 Rand Shmem 1058375 1053486 827935 764955 764376 756489 SSD Vanilla Shaohua HughOld HughNew HughPC4 HughPC0 Seq Anon 24634 24198 24673 25107 21614 70018 Seq Shmem 24959 24932 25052 25703 22030 69678 Rand Anon 43014 26146 28075 25989 26935 25901 Rand Shmem 45349 45215 28249 24268 24138 24332 These tests are, of course, two extremes of a very simple case: under heavier mixed loads I've not yet observed any consistent improvement or degradation, and wider testing would be welcome. Shaohua Li: Test shows Vanilla is slightly better in sequential workload than Hugh's patch. I observed with Hugh's patch sometimes the readahead size is shrinked too fast (from 8 to 1 immediately) in sequential workload if there is no hit. And in such case, continuing doing readahead is good actually. I don't prepare a sophisticated algorithm for the sequential workload because so far we can't guarantee sequential accessed pages are swap out sequentially. So I slightly change Hugh's heuristic - don't shrink readahead size too fast. Here is my test result (unit second, 3 runs average): Vanilla Hugh New Seq 356 370 360 Random 4525 2447 2444 Attached graph is the swapin/swapout throughput I collected with 'vmstat 2'. The first part is running a random workload (till around 1200 of the x-axis) and the second part is running a sequential workload. swapin and swapout throughput are almost identical in steady state in both workloads. These are expected behavior. while in Vanilla, swapin is much bigger than swapout especially in random workload (because wrong readahead). Original patches by: Shaohua Li and Konstantin Khlebnikov. [fengguang.wu@intel.com: swapin_nr_pages() can be static] Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Shaohua Li <shli@fusionio.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Cc: Rik van Riel <riel@redhat.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2014-02-06 13:48:51 -08:00

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