Theodore Ts'o 9924a92a8c ext4: pass context information to jbd2__journal_start() ...

So we can better understand what bits of ext4 are responsible for
long-running jbd2 handles, use jbd2__journal_start() so we can pass
context information for logging purposes.

The recommended way for finding the longer-running handles is:

   T=/sys/kernel/debug/tracing
   EVENT=$T/events/jbd2/jbd2_handle_stats
   echo "interval > 5" > $EVENT/filter
   echo 1 > $EVENT/enable

   ./run-my-fs-benchmark

   cat $T/trace > /tmp/problem-handles

This will list handles that were active for longer than 20ms.  Having
longer-running handles is bad, because a commit started at the wrong
time could stall for those 20+ milliseconds, which could delay an
fsync() or an O_SYNC operation.  Here is an example line from the
trace file describing a handle which lived on for 311 jiffies, or over
1.2 seconds:

postmark-2917  [000] ....   196.435786: jbd2_handle_stats: dev 254,32 
   tid 570 type 2 line_no 2541 interval 311 sync 0 requested_blocks 1
   dirtied_blocks 0

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2013-02-08 21:59:22 -05:00

..

9p

The following changes since commit 4cbe5a555fa58a79b6ecbb6c531b8bab0650778d:

2012-10-12 09:59:23 +09:00

adfs

adfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

affs

affs: drop vmtruncate

2012-12-20 14:00:01 -05:00

afs

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

2012-10-02 20:25:04 -07:00

autofs4

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2012-12-17 15:44:47 -08:00

befs

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

2012-10-02 20:25:04 -07:00

bfs

bfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

btrfs

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

2012-12-20 18:14:31 -08:00

cachefiles

FS-Cache: Mark cancellation of in-progress operation

2012-12-20 22:34:00 +00:00

ceph

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

2012-12-20 14:00:13 -08:00

cifs

CIFS: Don't let read only caching for mandatory byte-range locked files

2013-01-01 23:04:30 -06:00

coda

fs: push rcu_barrier() from deactivate_locked_super() to filesystems

2012-10-02 21:35:55 -04:00

configfs

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

cramfs

userns: Convert cramfs to use kuid/kgid where appropriate

2012-09-21 03:13:08 -07:00

debugfs

fs/debugsfs: remove unnecessary inode->i_private initialization

2012-11-15 17:46:42 -08:00

devpts

TTY: devpts, document devpts inode operations

2012-10-22 16:50:13 -07:00

dlm

dlm: fix lvb invalidation conditions

2012-11-16 11:20:42 -06:00

ecryptfs

fs/ecryptfs/crypto.c: make ecryptfs_encode_for_filename() static

2012-12-18 10:10:13 -06:00

efs

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

2012-10-02 20:25:04 -07:00

exofs

exofs: don't leak io_state and pages on read error

2012-12-14 12:17:32 +02:00

exportfs

Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux

2012-12-20 14:04:11 -08:00

ext2

ext2: fix return values on parse_options() failure

2012-10-09 23:23:53 +02:00

ext3

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

ext4

ext4: pass context information to jbd2__journal_start()

2013-02-08 21:59:22 -05:00

f2fs

f2fs: bug fixes for 3.8-rc2

2013-01-03 11:41:43 -08:00

fat

fat: fix incorrect function comment

2012-12-20 17:40:20 -08:00

freevxfs

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

2012-10-02 20:25:04 -07:00

fscache

FS-Cache: Clear remaining page count on retrieval cancellation

2012-12-20 22:35:15 +00:00

fuse

Merge branch 'akpm' (Andrew's patch-bomb)

2012-12-17 20:58:12 -08:00

gfs2

GFS2: Reset rd_last_alloc when it reaches the end of the rgrp

2013-01-02 10:05:27 +00:00

hfs

hfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

hfsplus

Merge branch 'akpm' (Andrew's patch-bomb)

2012-12-20 20:00:43 -08:00

hostfs

Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2012-10-10 11:15:20 +09:00

hpfs

hpfs: drop vmtruncate

2012-12-20 18:40:00 -05:00

hppfs

pidns: Use task_active_pid_ns where appropriate

2012-11-19 05:59:09 -08:00

hugetlbfs

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

2012-12-13 12:00:02 -08:00

isofs

tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking

2012-10-09 23:33:55 -04:00

jbd

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

2012-12-13 12:00:02 -08:00

jbd2

jbd2: add tracepoints which provide per-handle statistics

2013-02-08 13:00:22 -05:00

jffs2

jffs2: hold erase_completion_lock on exit

2012-11-18 11:59:01 +02:00

jfs

jfs: drop vmtruncate

2012-12-20 18:40:52 -05:00

lockd

lockd: Remove BUG_ON()s from fs/lockd/clntproc.c

2012-11-04 14:43:40 -05:00

logfs

logfs: drop vmtruncate

2012-12-20 18:40:53 -05:00

minix

minix: drop vmtruncate

2012-12-20 18:40:53 -05:00

ncpfs

ncpfs: drop vmtruncate

2012-12-20 18:40:54 -05:00

nfs

nfs: avoid dereferencing null pointer in initiate_bulk_draining

2013-01-05 14:26:51 -05:00

nfs_common

…

nfsd

Revert "nfsd: warn on odd reply state in nfsd_vfs_read"

2012-12-21 17:07:45 -08:00

nilfs2

nilfs2: drop vmtruncate

2012-12-20 18:40:54 -05:00

nls

…

notify

Merge branch 'for-next' of git://git.infradead.org/users/eparis/notify

2012-12-20 20:11:52 -08:00

ntfs

ntfs: drop vmtruncate

2012-12-20 18:40:55 -05:00

ocfs2

ocfs2: drop vmtruncate

2012-12-20 14:00:01 -05:00

omfs

omfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

openpromfs

fs: push rcu_barrier() from deactivate_locked_super() to filesystems

2012-10-02 21:35:55 -04:00

proc

mempolicy: remove arg from mpol_parse_str, mpol_to_str

2013-01-02 09:27:10 -08:00

pstore

pstore: remove __dev* attributes.

2013-01-03 15:57:14 -08:00

qnx4

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

2012-10-02 20:25:04 -07:00

qnx6

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

2012-10-02 20:25:04 -07:00

quota

quota: Use the pre-processor to compile out quotactl_cmd_write when !CONFIG_BLOCK

2012-12-13 16:33:24 +01:00

ramfs

…

reiserfs

reiserfs: drop vmtruncate

2012-12-20 14:00:01 -05:00

romfs

fs: push rcu_barrier() from deactivate_locked_super() to filesystems

2012-10-02 21:35:55 -04:00

squashfs

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

2012-10-02 20:25:04 -07:00

sysfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2012-12-17 15:44:47 -08:00

sysv

sysv: drop vmtruncate

2012-12-20 14:00:01 -05:00

ubifs

ubifs: use prandom_bytes

2012-12-17 17:15:26 -08:00

udf

udf: remove un-needed variable from inode_getblk

2012-12-13 16:33:23 +01:00

ufs

ufs: drop vmtruncate

2012-12-20 14:00:01 -05:00

xfs

xfs: fix sparse reported log CRC endian issue

2012-12-03 12:10:59 -06:00

aio.c

…

anon_inodes.c

…

attr.c

userns: Allow chown and setgid preservation

2012-11-20 04:17:24 -08:00

bad_inode.c

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

binfmt_aout.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

binfmt_elf_fdpic.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

binfmt_elf.c

binfmt_elf: fix corner case kfree of uninitialized data

2012-12-17 17:15:19 -08:00

binfmt_em86.c

exec: use -ELOOP for max recursion depth

2012-12-17 17:15:23 -08:00

binfmt_flat.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

binfmt_misc.c

exec: do not leave bprm->interp on stack

2012-12-20 17:40:19 -08:00

binfmt_script.c

exec: do not leave bprm->interp on stack

2012-12-20 17:40:19 -08:00

binfmt_som.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

bio-integrity.c

…

bio.c

vfs: fix: don't increase bio_slab_max if krealloc() fails

2012-10-22 22:00:26 +02:00

block_dev.c

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

buffer.c

fs/buffer.c: remove redundant initialization in alloc_page_buffers()

2012-12-12 17:38:35 -08:00

char_dev.c

char_dev: pin parent kobject

2012-10-22 08:50:37 +03:00

compat_binfmt_elf.c

coredump: extend core dump note section to contain file names of mapped files

2012-10-06 03:05:17 +09:00

compat_ioctl.c

Merge 3.7-rc3 into tty-next

2012-10-29 09:00:57 -07:00

compat.c

vfs: define struct filename and have getname() return it

2012-10-12 20:14:55 -04:00

coredump.c

do_coredump(): get rid of pt_regs argument

2012-11-29 00:01:25 -05:00

coredump.h

coredump: update coredump-related headers

2012-10-06 03:05:15 +09:00

dcache.c

vfs: d_obtain_alias() needs to use "/" as default name.

2012-12-20 18:49:10 -05:00

dcookies.c

…

direct-io.c

direct-io: don't read inode->i_blkbits multiple times

2012-11-29 12:38:44 -08:00

drop_caches.c

…

eventfd.c

fs, eventfd: add procfs fdinfo helper

2012-12-17 17:15:27 -08:00

eventpoll.c

epoll: prevent missed events on EPOLL_CTL_MOD

2013-01-02 09:16:43 -08:00

exec.c

Merge branch 'akpm' (Andrew's patch-bomb)

2012-12-20 20:00:43 -08:00

fcntl.c

Fix F_DUPFD_CLOEXEC breakage

2012-10-09 15:52:31 +09:00

fhandle.c

Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux

2012-12-20 14:04:11 -08:00

fifo.c

…

file_table.c

fs: Fix imbalance in freeze protection in mark_files_ro()

2012-12-20 13:57:36 -05:00

file.c

misc: remove __dev* attributes.

2013-01-03 15:57:16 -08:00

filesystems.c

vfs: define struct filename and have getname() return it

2012-10-12 20:14:55 -04:00

fs_struct.c

kill daemonize()

2012-11-28 21:49:02 -05:00

fs-writeback.c

writeback: fix a typo in comment

2012-12-12 17:38:34 -08:00

generic_acl.c

userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr

2012-09-18 01:01:35 -07:00

inode.c

mm: redefine address_space.assoc_mapping

2012-12-11 17:22:26 -08:00

internal.h

writeback: put unused inodes to LRU after writeback completion

2012-11-26 17:41:24 -08:00

ioctl.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

ioprio.c

…

Kconfig

Introduce a new file system, Flash-Friendly File System (F2FS), to Linux 3.8.

2012-12-20 13:54:52 -08:00

Kconfig.binfmt

coredump: make core dump functionality optional

2012-10-06 03:05:15 +09:00

libfs.c

vfs: drop vmtruncate

2012-12-20 18:46:29 -05:00

locks.c

UAPI Disintegration 2012-10-09

2012-10-09 18:35:22 -04:00

Makefile

f2fs: update Kconfig and Makefile

2012-12-11 13:43:42 +09:00

mbcache.c

…

mount.h

proc: Usable inode numbers for the namespace file descriptors.

2012-11-20 04:19:49 -08:00

mpage.c

…

namei.c

vfs: fix renameat to retry on ESTALE errors

2012-12-20 18:50:05 -05:00

namespace.c

vfs, freeze: use ACCESS_ONCE() to guard access to ->mnt_flags

2012-12-20 13:36:18 -05:00

no-block.c

…

open.c

vfs: make fchownat retry once on ESTALE errors

2012-12-20 18:50:07 -05:00

pipe.c

pipe(2) - race-free error recovery

2012-09-26 21:08:52 -04:00

pnode.c

…

pnode.h

vfs: Only support slave subtrees across different user namespaces

2012-11-19 05:59:20 -08:00

posix_acl.c

userns: Convert vfs posix_acl support to use kuids and kgids

2012-09-18 01:01:35 -07:00

proc_namespace.c

…

read_write.c

sendfile: allows bypassing of notifier events

2012-12-20 17:40:21 -08:00

read_write.h

compat: fs: Generic compat_sys_sendfile implementation

2012-10-02 21:35:55 -04:00

readdir.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

select.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

seq_file.c

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

signalfd.c

fs, epoll: add procfs fdinfo helper

2012-12-17 17:15:27 -08:00

splice.c

tcp: fix MSG_SENDPAGE_NOTLAST logic

2013-01-06 20:58:13 -08:00

stack.c

…

stat.c

vfs: fix readlinkat to retry on ESTALE

2012-12-20 18:50:01 -05:00

statfs.c

vfs: fix user_statfs to retry once on ESTALE errors

2012-12-20 18:50:07 -05:00

super.c

vfs: drop lock/unlock super

2012-10-09 23:33:39 -04:00

sync.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

timerfd.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

utimes.c

vfs: allow utimensat() calls to retry once on an ESTALE error

2012-12-20 18:50:08 -05:00

xattr_acl.c

userns: Fix posix_acl_file_xattr_userns gid conversion

2012-10-12 13:16:48 -07:00

xattr.c

vfs: make lremovexattr retry once on ESTALE error

2012-12-20 18:50:11 -05:00