Oleg Nesterov c027a474a6 oom: task->mm == NULL doesn't mean the memory was freed ...

exit_mm() sets ->mm == NULL then it does mmput()->exit_mmap() which
frees the memory.

However select_bad_process() checks ->mm != NULL before TIF_MEMDIE,
so it continues to kill other tasks even if we have the oom-killed
task freeing its memory.

Change select_bad_process() to check ->mm after TIF_MEMDIE, but skip
the tasks which have already passed exit_notify() to ensure a zombie
with TIF_MEMDIE set can't block oom-killer. Alternatively we could
probably clear TIF_MEMDIE after exit_mmap().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2011-08-01 15:24:12 -10:00

..

backing-dev.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback

2011-07-26 10:39:54 -07:00

bootmem.c

crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn

2011-03-23 19:47:19 -07:00

bounce.c

bounce: call flush_dcache_page() after bounce_copy_vec()

2010-09-09 18:57:25 -07:00

cleancache.c

mm: cleancache core ops functions and config

2011-05-26 10:01:36 -06:00

compaction.c

mm: compaction: abort compaction if too many pages are isolated and caller is asynchronous V2

2011-06-15 20:04:02 -07:00

debug-pagealloc.c

…

dmapool.c

devres: fix possible use after free

2011-07-25 20:57:14 -07:00

fadvise.c

…

failslab.c

failslab: simplify debugfs initialization

2011-07-26 16:49:46 -07:00

filemap_xip.c

mm: Convert i_mmap_lock to a mutex

2011-05-25 08:39:18 -07:00

filemap.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback

2011-07-26 10:39:54 -07:00

fremap.c

mm: don't access vm_flags as 'int'

2011-05-26 09:20:31 -07:00

highmem.c

mm,x86: fix kmap_atomic_push vs ioremap_32.c

2010-10-27 18:03:05 -07:00

huge_memory.c

mm/huge_memory.c: minor lock simplification in __khugepaged_exit

2011-07-25 20:57:09 -07:00

hugetlb.c

mm: hugetlb: fix coding style issues

2011-07-25 20:57:09 -07:00

hwpoison-inject.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

init-mm.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

internal.h

mm: nommu: sort mm->mmap list properly

2011-05-25 08:39:05 -07:00

Kconfig

mm Kconfig typo: cleancacne -> cleancache

2011-06-10 14:47:52 +02:00

Kconfig.debug

mm: debug-pagealloc: fix kconfig dependency warning

2011-03-22 17:44:02 -07:00

kmemcheck.c

…

kmemleak-test.c

kmemleak: remove memset by using kzalloc

2011-01-27 18:31:51 +00:00

kmemleak.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

ksm.c

ksm: fix NULL pointer dereference in scan_get_next_rmap_item()

2011-06-15 20:04:02 -07:00

maccess.c

maccess,probe_kernel: Make write/read src const void *

2011-05-25 19:56:23 -04:00

madvise.c

fs: kill i_alloc_sem

2011-07-20 20:47:46 -04:00

Makefile

mm: cleancache core ops functions and config

2011-05-26 10:01:36 -06:00

memblock.c

mm/memblock.c: avoid abuse of RED_INACTIVE

2011-07-25 20:57:09 -07:00

memcontrol.c

memcg: get rid of percpu_charge_mutex lock

2011-07-26 16:49:43 -07:00

memory_hotplug.c

mm: extend memory hotplug API to allow memory hotplug in virtual machines

2011-07-25 20:57:08 -07:00

memory-failure.c

mm/memory-failure.c: fix spinlock vs mutex order

2011-06-27 18:00:13 -07:00

memory.c

mm/futex: fix futex writes on archs with SW tracking of dirty & young

2011-07-25 20:57:11 -07:00

mempolicy.c

cpusets: randomize node rotor used in cpuset_mem_spread_node()

2011-07-26 16:49:43 -07:00

mempool.c

…

migrate.c

migrate: don't account swapcache as shmem

2011-06-16 15:01:24 -07:00

mincore.c

thp: mincore transparent hugepage support

2011-01-13 17:32:44 -08:00

mlock.c

mm: don't access vm_flags as 'int'

2011-05-26 09:20:31 -07:00

mm_init.c

…

mmap.c

mmap: fix and tidy up overcommit page arithmetic

2011-07-25 20:57:09 -07:00

mmu_context.c

…

mmu_notifier.c

thp: mmu_notifier_test_young

2011-01-13 17:32:46 -08:00

mmzone.c

mm: page allocator: adjust the per-cpu counter threshold when memory is low

2011-01-13 17:32:31 -08:00

mprotect.c

thp: mprotect: transparent huge page support

2011-01-13 17:32:44 -08:00

mremap.c

mm: Convert i_mmap_lock to a mutex

2011-05-25 08:39:18 -07:00

msync.c

sanitize vfs_fsync calling conventions

2010-05-21 18:31:21 -04:00

nobootmem.c

memblock/nobootmem: remove unneeded code from alloc_bootmem_node_high()

2011-05-25 08:39:31 -07:00

nommu.c

mmap: fix and tidy up overcommit page arithmetic

2011-07-25 20:57:09 -07:00

oom_kill.c

oom: task->mm == NULL doesn't mean the memory was freed

2011-08-01 15:24:12 -10:00

page_alloc.c

fail_page_alloc: simplify debugfs initialization

2011-07-26 16:49:46 -07:00

page_cgroup.c

mm/page_cgroup.c: simplify code by using SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macros

2011-07-25 20:57:09 -07:00

page_io.c

block: kill off REQ_UNPLUG

2011-03-10 08:52:27 +01:00

page_isolation.c

mm: page_isolation: codeclean fix comment and rm unneeded val init

2010-10-26 16:52:11 -07:00

page-writeback.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback

2011-07-26 10:39:54 -07:00

pagewalk.c

pagewalk: fix code comment for THP

2011-07-25 20:57:09 -07:00

percpu-km.c

percpu: clear memory allocated with the km allocator

2010-10-02 10:28:42 +03:00

percpu-vm.c

mm: remove gfp mask from pcpu_get_vm_areas

2011-01-13 17:32:34 -08:00

percpu.c

Merge branch 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

2011-05-24 11:53:42 -07:00

pgtable-generic.c

mm/pgtable-generic.c: fix CONFIG_SWAP=n build

2011-01-26 10:49:58 +10:00

prio_tree.c

sanitize <linux/prefetch.h> usage

2011-05-20 12:50:29 -07:00

quicklist.c

…

readahead.c

readahead: readahead page allocations are OK to fail

2011-05-25 08:39:25 -07:00

rmap.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/writeback

2011-07-26 10:39:54 -07:00

shmem.c

Merge 'akpm' patch series

2011-07-25 21:00:19 -07:00

slab.c

slab: use NUMA_NO_NODE

2011-07-31 18:14:21 +03:00

slob.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

slub.c

Merge branch 'slub/lockless' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6

2011-07-30 08:21:48 -10:00

sparse-vmemmap.c

tree-wide: fix comment/printk typos

2010-11-01 15:38:34 -04:00

sparse.c

mm: make some struct page's const

2011-07-25 20:57:07 -07:00

swap_state.c

block: remove per-queue plugging

2011-03-10 08:52:07 +01:00

swap.c

mm: batch activate_page() to reduce lock contention

2011-05-25 08:39:37 -07:00

swapfile.c

fs: seq_file - add event counter to simplify poll() support

2011-07-20 20:47:50 -04:00

thrash.c

mm: swap-token: add a comment for priority aging

2011-07-25 20:57:08 -07:00

truncate.c

mm: pincer in truncate_inode_pages_range

2011-07-25 20:57:10 -07:00

util.c

mm: nommu: sort mm->mmap list properly

2011-05-25 08:39:05 -07:00

vmalloc.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

vmscan.c

memcg: add memory.vmscan_stat

2011-07-26 16:49:42 -07:00

vmstat.c

mm, mem-hotplug: update pcp->stat_threshold when memory hotplug occur

2011-05-25 08:39:09 -07:00