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Jan Kara 08142579b6 mm: fix assertion mapping->nrpages == 0 in end_writeback() ... Under heavy memory and filesystem load, users observe the assertion mapping->nrpages == 0 in end_writeback() trigger. This can be caused by page reclaim reclaiming the last page from a mapping in the following race: CPU0 CPU1 ... shrink_page_list() __remove_mapping() __delete_from_page_cache() radix_tree_delete() evict_inode() truncate_inode_pages() truncate_inode_pages_range() pagevec_lookup() - finds nothing end_writeback() mapping->nrpages != 0 -> BUG page->mapping = NULL mapping->nrpages-- Fix the problem by doing a reliable check of mapping->nrpages under mapping->tree_lock in end_writeback(). Analyzed by Jay <jinshan.xiong@whamcloud.com>, lost in LKML, and dug out by Miklos Szeredi <mszeredi@suse.de>. Cc: Jay <jinshan.xiong@whamcloud.com> Cc: Miklos Szeredi <mszeredi@suse.de> Signed-off-by: Jan Kara <jack@suse.cz> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		14 years ago
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9p	9p: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
adfs	Fix common misspellings	14 years ago
affs	affs: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
afs	AFS: Use i_generation not i_version for the vnode uniquifier	14 years ago
autofs4	autofs4: bogus dentry_unhash() added in ->unlink()	14 years ago
befs	Fix common misspellings	14 years ago
bfs	bfs: remove unnecessary dentry_unhash on dir rename	14 years ago
btrfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable	14 years ago
cachefiles	Fix common misspellings	14 years ago
ceph	ceph: unwind canceled flock state	14 years ago
cifs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6	14 years ago
coda	coda_ioctl_permission() is safe in RCU mode	14 years ago
configfs	configfs: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
cramfs	…
debugfs	debugfs: move to new strtobool	14 years ago
devpts	fs/devpts/inode.c: correctly check d_alloc_name() return code in devpts_pty_new()	14 years ago
dlm	Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6	14 years ago
ecryptfs	eCryptfs: Remove ecryptfs_header_cache_2	14 years ago
efs	block: remove per-queue plugging	14 years ago
exofs	exofs: remove unnecessary dentry_unhash on rmdir/rename_dir	14 years ago
exportfs	vfs: Add open by file handle support	14 years ago
ext2	ext2: remove unnecessary dentry_unhash on rmdir/rename_dir	14 years ago
ext3	fs: pass exact type of data dirties to ->dirty_inode	14 years ago
ext4	ext4: fixed tracepoints cleanup	14 years ago
fat	fat: Fix corrupt inode flags when remove ATTR_SYS flag	14 years ago
freevxfs	treewide: fix a few typos in comments	14 years ago
fscache	fscache: remove dead code under CONFIG_WORKQUEUE_DEBUGFS	14 years ago
fuse	more conservative S_NOSEC handling	14 years ago
gfs2	Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes	14 years ago
hfs	hfs: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
hfsplus	hfsplus: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
hostfs	hostfs: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
hpfs	hpfs: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
hppfs	…
hugetlbfs	mm: don't access vm_flags as 'int'	14 years ago
isofs	isofs: fix bh leak in isofs_fill_super() error case	14 years ago
jbd	jbd: Fix comment to match the code in journal_start()	14 years ago
jbd2	jbd2: Fix oops in jbd2_journal_remove_journal_head()	14 years ago
jffs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	14 years ago
jfs	jfs: agstart field must be 64 bits	14 years ago
lockd	NLM: Don't hang forever on NLM unlock requests	14 years ago
logfs	logfs doesn't need ->permission() at all	14 years ago
minix	minix: remove unnecessary dentry_unhash on rmdir, dir rename	14 years ago
ncpfs	ncpfs: fix rename over directory with dangling references	14 years ago
nfs	NFS: Fix decode_secinfo_maxsz	14 years ago
nfs_common	Fix common misspellings	14 years ago
nfsd	nfsd4: fix break_lease flags on nfsd open	14 years ago
nilfs2	nilfs2_permission() doesn't need to bail out in RCU mode	14 years ago
nls	…
notify	Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6	14 years ago
ntfs	Fix common misspellings	14 years ago
ocfs2	more conservative S_NOSEC handling	14 years ago
omfs	Remove unneeded version.h includes from fs/	14 years ago
openpromfs	…
partitions	Revert "block: Remove extra discard_alignment from hd_struct."	14 years ago
proc	proc_sys_permission() is OK in RCU mode	14 years ago
pstore	pstore: fix pstore filesystem mount/remount issue	14 years ago
qnx4	block: remove per-queue plugging	14 years ago
quota	vmscan: change shrinker API by passing shrink_control struct	14 years ago
ramfs	ramfs: fix memleak on no-mmu arch	14 years ago
reiserfs	reiserfs_permission() doesn't need to bail out in RCU mode	14 years ago
romfs	romfs: fix romfs_get_unmapped_area() argument check	14 years ago
squashfs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus	14 years ago
sysfs	Delay struct net freeing while there's a sysfs instance refering to it	14 years ago
sysv	sysv: remove unnecessary dentry_unhash from rmdir, dir rename	14 years ago
ubifs	ubifs: dereferencing an ERR_PTR in ubifs_mount()	14 years ago
udf	udf: remove unnecessary dentry_unhash from rmdir, dir rename	14 years ago
ufs	ufs: remove unnecessary dentry_unhash from rmdir, dir rename	14 years ago
xfs	xfs: prevent bogus assert when trying to remove non-existent attribute	14 years ago
Kconfig	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	14 years ago
Kconfig.binfmt	…
Makefile	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6	14 years ago
aio.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	14 years ago
anon_inodes.c	…
attr.c	Cache xattr security drop check for write v2	14 years ago
bad_inode.c	bad_inode_permission() is safe from RCU mode	14 years ago
binfmt_aout.c	…
binfmt_elf.c	brk: COMPAT_BRK: fix detection of randomized brk	14 years ago
binfmt_elf_fdpic.c	…
binfmt_em86.c	…
binfmt_flat.c	CRED: Fix load_flat_shared_library() to initialise bprm correctly	14 years ago
binfmt_misc.c	…
binfmt_script.c	…
binfmt_som.c	…
bio-integrity.c	block: Require subsystems to explicitly allocate bio_set integrity mempool	14 years ago
bio.c	block: improve the bio_add_page() and bio_add_pc_page() descriptions	14 years ago
block_dev.c	block: use the passed in @bdev when claiming if partno is zero	14 years ago
buffer.c	vfs: Fix data corruption after failed write in __block_write_begin()	14 years ago
char_dev.c	…
compat.c	exec: unify do_execve/compat_do_execve code	14 years ago
compat_binfmt_elf.c	…
compat_ioctl.c	…
dcache.c	vmscan: change shrinker API by passing shrink_control struct	14 years ago
dcookies.c	oprofile, dcookies: Fix possible circular locking dependency	14 years ago
direct-io.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	14 years ago
drop_caches.c	vmscan: change shrinker API by passing shrink_control struct	14 years ago
eventfd.c	Docbook: add fs/eventfd.c and fix typos in it	14 years ago
eventpoll.c	Fix common misspellings	14 years ago
exec.c	KEYS/DNS: Fix ____call_usermodehelper() to not lose the session keyring	14 years ago
fcntl.c	userns: rename is_owner_or_cap to inode_owner_or_capable	14 years ago
fhandle.c	fs/fhandle.c: add <linux/personality.h> for ia64	14 years ago
fifo.c	Filesystem: fifo: Fixed coding style issue.	14 years ago
file.c	vfs: avoid large kmalloc()s for the fdtable	14 years ago
file_table.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	14 years ago
filesystems.c	fs: synchronize_rcu when unregister_filesystem success not failure	14 years ago
fs-writeback.c	fs: pass exact type of data dirties to ->dirty_inode	14 years ago
fs_struct.c	…
generic_acl.c	userns: rename is_owner_or_cap to inode_owner_or_capable	14 years ago
inode.c	mm: fix assertion mapping->nrpages == 0 in end_writeback()	14 years ago
internal.h	fs: move i_wb_list out from under inode_lock	14 years ago
ioctl.c	vfs: cleanup do_vfs_ioctl()	14 years ago
ioprio.c	…
libfs.c	libfs: drop unneeded dentry_unhash	14 years ago
locks.c	Merge branch 'for-2.6.39' of git://linux-nfs.org/~bfields/linux	14 years ago
mbcache.c	vmscan: change shrinker API by passing shrink_control struct	14 years ago
mpage.c	mm/fs: add hooks to support cleancache	14 years ago
namei.c	fix comment in generic_permission()	14 years ago
namespace.c	fs/namespace.c: bound mount propagation fix	14 years ago
nfsctl.c	open-style analog of vfs_path_lookup()	14 years ago
no-block.c	…
open.c	fs: Use BUG_ON(!mnt) at dentry_open().	14 years ago
pipe.c	…
pnode.c	…
pnode.h	…
posix_acl.c	…
read_write.c	…
read_write.h	…
readdir.c	…
select.c	select: remove unused MAX_SELECT_SECONDS	14 years ago
seq_file.c	…
signalfd.c	…
splice.c	splice: add wakeup_pipe_readers()	14 years ago
stack.c	…
stat.c	readlinkat(), fchownat() and fstatat() with empty relative pathnames	14 years ago
statfs.c	clean statfs-like syscalls up	14 years ago
super.c	more conservative S_NOSEC handling	14 years ago
sync.c	Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block	14 years ago
timerfd.c	timerfd: Fix wakeup of processes when timer is cancelled on clock change	14 years ago
utimes.c	userns: rename is_owner_or_cap to inode_owner_or_capable	14 years ago
xattr.c	Cache xattr security drop check for write v2	14 years ago
xattr_acl.c	…