Dave Chinner 49641f1acf Fix reference counting race on log buffers ... When we release the iclog, we do an atomic_dec_and_lock to determine if we are the last reference and need to trigger update of log headers and writeout. However, in xlog_state_get_iclog_space() we also need to check if we have the last reference count there. If we do, we release the log buffer, otherwise we decrement the reference count. But the compare and decrement in xlog_state_get_iclog_space() is not atomic, so both places can see a reference count of 2 and neither will release the iclog. That leads to a filesystem hang. Close the race by replacing the atomic_read() and atomic_dec() pair with atomic_add_unless() to ensure that they are executed atomically. Signed-off-by: Dave Chinner <david@fromorbit.com> Reviewed-by: Tim Shimmin <tes@sgi.com> Tested-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-07-11 11:37:18 -07:00
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9p	9p: fix O_APPEND in legacy mode	2008-07-03 09:59:03 -05:00
adfs	…
affs	…
afs	Fix various old email addresses for dwmw2	2008-06-06 11:29:10 -07:00
autofs	…
autofs4	…
befs	byteorder: don't directly include linux/byteorder/generic.h	2008-05-16 12:01:45 -07:00
bfs	…
cifs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6	2008-06-11 09:45:51 -07:00
coda	…
configfs	…
cramfs	…
debugfs	…
devpts	…
dlm	dlm: fix plock dev_write return value	2008-05-19 15:37:27 -05:00
ecryptfs	ecryptfs: remove unnecessary mux from ecryptfs_init_ecryptfs_miscdev()	2008-07-04 10:40:05 -07:00
efs	…
exportfs	…
ext2	…
ext3	ext3: add missing unlock to error path in ext3_quota_write()	2008-07-04 10:40:05 -07:00
ext4	ext4: add missing unlock to an error path in ext4_quota_write()	2008-07-04 10:40:05 -07:00
fat	fat: relax the permission check of fat_setattr()	2008-06-12 18:05:39 -07:00
freevxfs	…
fuse	fuse: fix thinko in max I/O size calucation	2008-06-17 18:08:10 -07:00
gfs2	[GFS2] fix gfs2 block allocation (cleaned up)	2008-06-24 19:02:28 +01:00
hfs	…
hfsplus	Fix hfsplus oops on image without extents	2008-05-13 08:02:24 -07:00
hostfs	…
hpfs	…
hppfs	fix hppfs Makefile breakage	2008-05-21 16:55:58 -07:00
hugetlbfs	…
isofs	…
jbd	jbd: need to hold j_state_lock to updates to transaction t_state to T_COMMIT	2008-05-14 19:11:14 -07:00
jbd2	jbd2: Fix barrier fallback code to re-lock the buffer head	2008-06-03 22:31:11 -04:00
jffs2	…
jfs	…
lockd	…
minix	…
msdos	…
ncpfs	…
nfs	NFS: Fix readdir cache invalidation	2008-07-08 15:22:40 -04:00
nfs_common	…
nfsd	nfsd: reorder printk in do_probe_callback to avoid use-after-free	2008-05-18 19:13:07 -04:00
nls	…
ntfs	ntfs: le*_add_cpu conversion	2008-05-24 09:56:08 -07:00
ocfs2	ocfs2: Fix flags in ocfs2_file_lock	2008-07-10 09:25:39 -07:00
openpromfs	…
partitions	…
proc	Fix pagemap_read() use of struct mm_walk	2008-07-05 13:13:44 -07:00
qnx4	…
ramfs	…
reiserfs	reiserfs: discard prealloc in reiserfs_delete_inode	2008-07-08 12:39:31 -07:00
romfs	…
smbfs	…
sysfs	sysfs: remove error messages for -EEXIST case	2008-05-14 22:34:16 -07:00
sysv	…
udf	udf: Fix regression in UDF anchor block detection	2008-06-24 11:38:03 +02:00
ufs	ufs: remove unneeded ufs_put_inode prototype	2008-05-13 08:02:23 -07:00
vfat	…
xfs	Fix reference counting race on log buffers	2008-07-11 11:37:18 -07:00
Kconfig	ntfs: update help text	2008-07-04 10:40:07 -07:00
Kconfig.binfmt	frv: don't offer BINFMT_FLAT	2008-06-06 11:29:08 -07:00
Makefile	…
aio.c	uml: activate_mm: remove the dead PF_BORROWED_MM check	2008-06-06 11:36:22 -07:00
anon_inodes.c	…
attr.c	…
bad_inode.c	…
binfmt_aout.c	…
binfmt_elf.c	Remove last traces of a.out support from ELF loader.	2008-06-16 10:20:57 -07:00
binfmt_elf_fdpic.c	nommu: fix ksize() abuse	2008-06-06 11:29:13 -07:00
binfmt_em86.c	…
binfmt_flat.c	nommu: fix ksize() abuse	2008-06-06 11:29:13 -07:00
binfmt_misc.c	…
binfmt_script.c	…
binfmt_som.c	…
bio.c	…
block_dev.c	[PATCH] fix cgroup-inflicted breakage in block_dev.c	2008-06-23 08:30:55 -04:00
buffer.c	Properly notify block layer of sync writes	2008-07-01 09:07:34 +02:00
char_dev.c	…
compat.c	[PATCH] get rid of leak in compat_execve()	2008-05-16 17:23:05 -04:00
compat_binfmt_elf.c	…
compat_ioctl.c	…
dcache.c	[patch 2/3] vfs: dcache cleanups	2008-06-23 13:07:00 -04:00
dcookies.c	…
direct-io.c	…
dnotify.c	…
dquot.c	quota: don't call sync_fs() from vfs_quota_off() when there's no quota turn off	2008-05-13 08:02:23 -07:00
drop_caches.c	…
eventfd.c	…
eventpoll.c	…
exec.c	exec: fix stack excutability without PT_GNU_STACK	2008-07-10 13:25:43 -07:00
fcntl.c	…
fifo.c	…
file.c	[PATCH] avoid multiplication overflows and signedness issues for max_fds	2008-05-16 17:22:52 -04:00
file_table.c	…
filesystems.c	…
fs-writeback.c	…
generic_acl.c	…
inode.c	…
inotify.c	…
inotify_user.c	…
internal.h	…
ioctl.c	…
ioprio.c	…
libfs.c	add kernel-doc for simple_read_from_buffer and memory_read_from_buffer	2008-07-04 10:40:07 -07:00
locks.c	[patch 4/4] flock: remove unused fields from file_lock_operations	2008-06-23 11:52:30 -04:00
mbcache.c	…
mpage.c	…
namei.c	[patch 3/4] vfs: fix ERR_PTR abuse in generic_readlink	2008-06-23 11:52:30 -04:00
namespace.c	…
nfsctl.c	…
no-block.c	…
open.c	security: filesystem capabilities: fix fragile setuid fixup code	2008-07-04 10:40:08 -07:00
pipe.c	[patch 1/4] vfs: path_{get,put}() cleanups	2008-06-23 11:52:29 -04:00
pnode.c	…
pnode.h	…
posix_acl.c	…
quota.c	…
quota_v1.c	…
quota_v2.c	…
read_write.c	…
read_write.h	…
readdir.c	…
select.c	Fix performance regression on lmbench select benchmark	2008-06-22 12:23:15 -07:00
seq_file.c	…
signalfd.c	…
splice.c	splice: handle try_to_release_page() failure	2008-05-28 14:49:27 +02:00
stack.c	…
stat.c	…
super.c	…
sync.c	…
timerfd.c	…
utimes.c	[patch for 2.6.26 4/4] vfs: utimensat(): fix write access check for futimens()	2008-06-23 08:43:52 -04:00
xattr.c	…
xattr_acl.c	…