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7eae68f6dd
linux/fs
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Johannes Weiner 7eae68f6dd xfs: properly account for reclaimed inodes 
commit 081003fff4 upstream.

When marking an inode reclaimable, a per-AG counter is increased, the
inode is tagged reclaimable in its per-AG tree, and, when this is the
first reclaimable inode in the AG, the AG entry in the per-mount tree
is also tagged.

When an inode is finally reclaimed, however, it is only deleted from
the per-AG tree.  Neither the counter is decreased, nor is the parent
tree's AG entry untagged properly.

Since the tags in the per-mount tree are not cleared, the inode
shrinker iterates over all AGs that have had reclaimable inodes at one
point in time.

The counters on the other hand signal an increasing amount of slab
objects to reclaim.  Since "70e60ce xfs: convert inode shrinker to
per-filesystem context" this is not a real issue anymore because the
shrinker bails out after one iteration.

But the problem was observable on a machine running v2.6.34, where the
reclaimable work increased and each process going into direct reclaim
eventually got stuck on the xfs inode shrinking path, trying to scan
several million objects.

Fix this by properly unwinding the reclaimable-state tracking of an
inode when it is reclaimed.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
Backported-by: Stefan Priebe <s.priebe@profihost.ag>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-23 15:24:09 -07:00
..
9p 9p: Skip check for mandatory locks when unlocking 2010-04-26 07:41:29 -07:00
adfs adfs: remove redundant test on unsigned 2009-09-24 07:21:05 -07:00
affs fix affs parse_options() 2010-02-09 04:50:48 -08:00
afs FS-Cache: Handle pages pending storage that get evicted under OOM conditions 2009-11-19 18:11:35 +00:00
autofs trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
autofs4 autofs4 - fix missed case when changing to use struct path 2009-08-31 17:44:05 -10:00
befs befs: fix leak 2010-02-23 07:37:55 -08:00
bfs Fix failure exits in bfs_fill_super() 2010-02-09 04:50:46 -08:00
btrfs btrfs: Require CAP_SYS_ADMIN for filesystem rebalance 2011-05-09 15:55:35 -07:00
cachefiles CacheFiles: Fix error handling in cachefiles_determine_cache_security() 2010-05-26 14:29:20 -07:00
cifs cifs: add fallback in is_path_accessible for old servers 2011-05-23 11:20:18 -07:00
coda headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
configfs writeback: add name to backing_dev_info 2009-09-11 09:20:26 +02:00
cramfs
debugfs debugfs: fix create mutex racy fops and private data 2009-12-18 14:04:16 -08:00
devpts devpts_get_tty() should validate inode 2009-12-18 14:04:15 -08:00
dlm dlm: send reply before bast 2010-08-13 13:20:21 -07:00
ecryptfs eCryptfs: Allow 2 scatterlist entries for encrypted filenames 2011-06-23 15:24:04 -07:00
efs get rid of BKL in fs/efs 2009-06-17 00:36:36 -04:00
exofs exofs: confusion between kmap() and kmap_atomic() api 2010-07-05 11:10:47 -07:00
exportfs
ext2 ext2: Fix link count corruption under heavy link+rename load 2011-03-07 15:17:54 -08:00
ext3 ext3: Fix fs corruption when make_indexed_dir() fails 2011-06-23 15:24:01 -07:00
ext4 ext4: release page cache in ext4_mb_load_buddy error path 2011-06-23 15:24:01 -07:00
fat fat: Fix corrupt inode flags when remove ATTR_SYS flag 2011-06-23 15:24:06 -07:00
freevxfs headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
fscache FS-Cache: Provide nop fscache_stat_d() if CONFIG_FSCACHE_STATS=n 2009-11-20 21:50:44 +00:00
fuse fuse: fix hang of single threaded fuseblk filesystem 2011-03-07 15:17:53 -08:00
gfs2 GFS2: BUG in gfs2_adjust_quota 2011-05-09 15:55:12 -07:00
hfs hfs: fix a potential buffer overflow 2009-12-18 14:04:08 -08:00
hfsplus hfsplus: refuse to mount volumes larger than 2TB 2009-10-29 07:39:27 -07:00
hostfs hostfs: set maximum filesize in superblock for proper LFS support 2009-06-30 18:56:03 -07:00
hpfs headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
hppfs
hugetlbfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-09-24 08:32:11 -07:00
isofs fs: Make unload_nls() NULL pointer safe 2009-09-24 07:47:42 -04:00
jbd jbd: fix fsync() tid wraparound bug 2011-06-23 15:24:01 -07:00
jbd2 ext4, jbd2: Add barriers for file systems with exernal journals 2010-08-02 10:21:10 -07:00
jffs2 jffs2: Fix long-standing bug with symlink garbage collection. 2009-12-18 14:05:52 -08:00
jfs jfs: don't allow os2 xattr namespace overlap with others 2010-08-13 13:19:48 -07:00
lockd headers: utsname.h redux 2009-09-23 18:13:10 -07:00
minix V3 minixfs: add missing directory type checking 2009-09-23 07:39:57 -07:00
ncpfs const: mark struct vm_struct_operations 2009-09-27 11:39:25 -07:00
nfs nfs: fix compilation warning 2011-05-09 15:55:13 -07:00
nfs_common
nfsd Open with O_CREAT flag set fails to open existing files on non writable directories 2011-05-09 15:55:00 -07:00
nilfs2 nilfs2: fix data loss in mmap page write for hole blocks 2011-04-14 16:53:26 -07:00
nls Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6 2009-09-30 09:31:14 -07:00
notify inotify: fix inotify oneshot support 2010-09-26 17:21:38 -07:00
ntfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-09-24 08:32:11 -07:00
ocfs2 Treat writes as new when holes span across page boundaries 2011-04-14 16:53:34 -07:00
omfs const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
openpromfs
partitions Fix for buffer overflow in ldm_frag_add not sufficient 2011-06-23 15:24:02 -07:00
proc proc: do proper range check on readdir offset 2011-04-22 08:44:26 -07:00
qnx4 qnx4: remove write support 2009-09-23 07:39:30 -07:00
quota quota: Don't write quota info in dquot_commit() 2011-04-14 16:53:30 -07:00
ramfs ramfs: fix memleak on no-mmu arch 2011-04-22 08:44:15 -07:00
reiserfs reiserfs: fix oops while creating privroot with selinux enabled 2010-08-13 13:20:20 -07:00
romfs fix leak in romfs_fill_super() 2010-02-09 04:50:47 -08:00
smbfs fs: Make unload_nls() NULL pointer safe 2009-09-24 07:47:42 -04:00
squashfs Squashfs: handle corruption of directory structure 2011-04-14 16:53:44 -07:00
sysfs sysfs: checking for NULL instead of ERR_PTR 2010-09-20 13:17:50 -07:00
sysv get rid of BKL in fs/sysv 2009-06-17 00:36:37 -04:00
ubifs UBIFS: fix memory leak on error path 2011-06-23 15:24:05 -07:00
udf udf: Try harder when looking for VAT inode 2010-01-06 15:05:00 -08:00
ufs ufs: sector_t cannot be negative 2009-06-18 13:03:46 -07:00
xfs xfs: properly account for reclaimed inodes 2011-06-23 15:24:09 -07:00
aio.c aio: wake all waiters when destroying ctx 2011-03-27 11:30:26 -07:00
anon_inodes.c headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
attr.c truncate: new helpers 2009-09-24 08:41:47 -04:00
bad_inode.c
binfmt_aout.c Split 'flush_old_exec' into two functions 2010-02-09 04:50:49 -08:00
binfmt_elf_fdpic.c Split 'flush_old_exec' into two functions 2010-02-09 04:50:49 -08:00
binfmt_elf.c Split 'flush_old_exec' into two functions 2010-02-09 04:50:49 -08:00
binfmt_em86.c
binfmt_flat.c Split 'flush_old_exec' into two functions 2010-02-09 04:50:49 -08:00
binfmt_misc.c binfmt_misc: fix binfmt_misc priority 2010-09-20 13:17:54 -07:00
binfmt_script.c
binfmt_som.c Split 'flush_old_exec' into two functions 2010-02-09 04:50:49 -08:00
bio-integrity.c block: fix bugs in bio-integrity mempool usage 2010-02-09 04:50:58 -08:00
bio.c bio: take care not overflow page count when mapping/copying user data 2010-12-09 13:26:52 -08:00
block_dev.c block: rescan partitions on invalidated devices on -ENOMEDIA too 2011-06-23 15:24:01 -07:00
buffer.c Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-block 2009-09-25 09:27:30 -07:00
char_dev.c char: Mark /dev/zero and /dev/kmem as not capable of writeback 2010-09-26 17:21:26 -07:00
compat_binfmt_elf.c
compat_ioctl.c fs: add missing compat_ptr handling for FS_IOC_RESVSP ioctl 2009-11-12 07:25:57 -08:00
compat.c exec: copy-and-paste the fixes into compat_do_execve() paths 2011-04-14 16:53:55 -07:00
dcache.c fs: call security_d_instantiate in d_obtain_alias V2 2011-03-27 11:30:50 -07:00
dcookies.c oprofile, dcookies: Fix possible circular locking dependency 2011-06-23 15:24:07 -07:00
direct-io.c
drop_caches.c sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
eventfd.c anonfd: split interface into file creation and install 2009-09-23 07:39:29 -07:00
eventpoll.c epoll: prevent creating circular epoll structures 2011-03-02 09:47:04 -05:00
exec.c exec: copy-and-paste the fixes into compat_do_execve() paths 2011-04-14 16:53:55 -07:00
fcntl.c Fix race in tty_fasync() properly 2010-02-23 07:37:44 -08:00
fifo.c
file_table.c CRED: Fix kernel panic upon security_file_alloc() failure. 2011-03-02 09:46:38 -05:00
file.c headers: remove sched.h from interrupt.h 2009-10-11 11:20:58 -07:00
filesystems.c
fs_struct.c
fs-writeback.c writeback: disable periodic old data writeback for !dirty_writeback_centisecs 2010-07-05 11:10:45 -07:00
generic_acl.c
inode.c vfs: optimize touch_time() too 2009-09-24 07:47:27 -04:00
internal.h fs: fix overflow in sys_mount() for in-kernel calls 2009-09-24 08:40:15 -04:00
ioctl.c __generic_block_fiemap(): fix for files bigger than 4GB 2009-11-12 07:26:01 -08:00
ioprio.c
Kconfig powerpc: Cleanup Kconfig selection of hugetlbfs support 2009-10-30 15:03:54 +11:00
Kconfig.binfmt
libfs.c wrong type for 'magic' argument in simple_fill_super() 2010-07-05 11:11:12 -07:00
locks.c const: make lock_manager_operations const 2009-09-22 07:17:25 -07:00
Makefile
mbcache.c
mpage.c
namei.c fix LOOKUP_FOLLOW on automount "symlinks" 2010-03-15 08:49:32 -07:00
namespace.c vfs: add NOFOLLOW flag to umount(2) 2010-07-05 11:11:15 -07:00
nfsctl.c
no-block.c
open.c fs: change sys_truncate length parameter type 2009-09-23 09:21:05 -07:00
pipe.c pipe: fix failure to return error code on ->confirm() 2010-11-22 10:47:34 -08:00
pnode.c
pnode.h
posix_acl.c
read_write.c sendfile(): check f_op.splice_write() rather than f_op.sendpage() 2011-03-02 09:46:40 -05:00
read_write.h
readdir.c
select.c headers: remove sched.h from poll.h 2009-10-04 15:05:10 -07:00
seq_file.c vfs: seq_file: add helpers for data filling 2009-09-24 07:47:35 -04:00
signalfd.c signalfd: fill in ssi_int for posix timers and message queues 2010-08-13 13:19:39 -07:00
splice.c sendfile(): check f_op.splice_write() rather than f_op.sendpage() 2011-03-02 09:46:40 -05:00
stack.c
stat.c Add unlocked version of inode_add_bytes() function 2010-01-06 15:05:01 -08:00
super.c vfs: get_sb_single() - do not pass options twice 2010-01-28 15:00:47 -08:00
sync.c fs/buffer.c: clean up EXPORT* macros 2009-09-23 07:39:29 -07:00
timerfd.c
utimes.c
xattr_acl.c
xattr.c VFS: Factor out part of vfs_setxattr so it can be called from the SELinux hook for inode_setsecctx. 2009-09-10 10:11:22 +10:00