Zygo Blaxell 2f3165ecf1 btrfs: don't force mounts to wait for cleaner_kthread to delete one or more subvolumes ... During a mount, we start the cleaner kthread first because the transaction kthread wants to wake up the cleaner kthread. We start the transaction kthread next because everything in btrfs wants transactions. We do reloc recovery in the thread that was doing the original mount call once the transaction kthread is running. This means that the cleaner kthread could already be running when reloc recovery happens (e.g. if a snapshot delete was started before a crash). Relocation does not play well with the cleaner kthread, so a mutex was added in commit 5f3164813b "Btrfs: fix race between balance recovery and root deletion" to prevent both from being active at the same time. If the cleaner kthread is already holding the mutex by the time we get to btrfs_recover_relocation, the mount will be blocked until at least one deleted subvolume is cleaned (possibly more if the mount process doesn't get the lock right away). During this time (which could be an arbitrarily long time on a large/slow filesystem), the mount process is stuck and the filesystem is unnecessarily inaccessible. Fix this by locking cleaner_mutex before we start cleaner_kthread, and unlocking the mutex after mount no longer requires it. This ensures that the mounting process will not be blocked by the cleaner kthread. The cleaner kthread is already prepared for mutex contention and will just go to sleep until the mutex is available. Signed-off-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org> Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>		2016-05-06 15:22:49 +02:00
..
9p	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
adfs	fs/adfs/adfs.h: tidy up comments	2016-01-20 17:09:18 -08:00
affs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
afs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
autofs4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-03-19 18:52:29 -07:00
befs	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
bfs	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
btrfs	btrfs: don't force mounts to wait for cleaner_kthread to delete one or more subvolumes	2016-05-06 15:22:49 +02:00
cachefiles	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
ceph	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
cifs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
coda	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-01-23 12:24:56 -08:00
configfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
cramfs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
crypto	ext4/fscrypto: avoid RCU lookup in d_revalidate	2016-04-12 20:01:35 -07:00
debugfs	debugfs: Make automount point inodes permanently empty	2016-04-12 15:01:53 -07:00
devpts	devpts: clean up interface to pty drivers	2016-04-18 13:43:02 -07:00
dlm	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
ecryptfs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
efivarfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
efs	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
exofs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
exportfs	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
ext2	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
ext4	ext4/fscrypto: avoid RCU lookup in d_revalidate	2016-04-12 20:01:35 -07:00
f2fs	fscrypto: don't let data integrity writebacks fail with ENOMEM	2016-04-12 10:25:30 -07:00
fat	fat: add config option to set UTF-8 mount option by default	2016-03-22 15:36:02 -07:00
freevxfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
fscache	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
fuse	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
gfs2	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
hfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
hfsplus	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
hostfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
hpfs	hpfs: don't truncate the file when delete fails	2016-02-27 19:15:51 -05:00
hugetlbfs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
isofs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
jbd2	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
jffs2	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
jfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
kernfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
lockd	lockd: constify nlmsvc_binding structure	2016-01-07 10:10:50 -05:00
logfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
minix	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
ncpfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
nfs	These changes contains a fix for overlayfs interacting with some	2016-04-07 17:22:20 -07:00
nfs_common
nfsd	Various bugfixes, a RDMA update from Chuck Lever, and support for a new	2016-03-24 19:50:32 -07:00
nilfs2	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
nls
notify	fsnotify: turn fsnotify reaper thread into a workqueue job	2016-02-18 16:23:24 -08:00
ntfs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
ocfs2	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2016-04-04 13:18:27 -07:00
omfs
openpromfs	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
orangefs	Orangefs: cleanups and a strncpy vulnerability fix.	2016-04-09 10:33:58 -07:00
overlayfs	fs: add file_dentry()	2016-03-26 16:14:37 -04:00
proc	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
pstore	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
qnx4	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
qnx6	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
quota	quota: Handle Q_GETNEXTQUOTA when quota is disabled	2016-03-29 17:20:10 +02:00
ramfs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
reiserfs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
romfs	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
squashfs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
sysfs	platform/chrome: Branch for v4.4	2015-11-13 21:53:18 -08:00
sysv	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
tracefs	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
ubifs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
udf	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
ufs	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
xfs	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
aio.c
anon_inodes.c
attr.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
bad_inode.c	fs/bad_inode.c: is_bad_inode can be boolean	2015-12-06 21:17:14 -05:00
binfmt_aout.c
binfmt_elf_fdpic.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
binfmt_elf.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
binfmt_script.c
block_dev.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
buffer.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
char_dev.c
compat_binfmt_elf.c
compat_ioctl.c	Merge 4.5-rc4 into char-misc-next	2016-02-14 14:25:59 -08:00
compat.c	saner calling conventions for copy_mount_options()	2016-01-04 10:28:32 -05:00
coredump.c	fs/coredump: prevent fsuid=0 dumps into user-controlled directories	2016-03-22 15:36:02 -07:00
dax.c	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
dcache.c	fs: add file_dentry()	2016-03-26 16:14:37 -04:00
dcookies.c
direct-io.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
drop_caches.c
eventfd.c	eventfd: document lockless access in eventfd_poll	2016-03-22 15:36:02 -07:00
eventpoll.c	timer: convert timer_slack_ns from unsigned long to u64	2016-03-17 15:09:34 -07:00
exec.c	Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-03-20 19:08:56 -07:00
fcntl.c	fcntl: allow to set O_DIRECT flag on pipe	2016-01-09 02:55:37 -05:00
fhandle.c	fs/coredump: prevent fsuid=0 dumps into user-controlled directories	2016-03-22 15:36:02 -07:00
file_table.c
file.c	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
filesystems.c	find_filesystem(): simplify comparison	2016-01-19 12:02:23 -05:00
fs_pin.c
fs_struct.c
fs-writeback.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
inode.c	writeback: initialize inode members that track writeback history	2016-02-16 14:57:21 -07:00
internal.h	Merge branch 'for-linus' into work.misc	2016-01-08 21:20:11 -05:00
ioctl.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
Kconfig	Merge tag 'ofs-pull-tag-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux	2016-03-26 12:59:04 -07:00
Kconfig.binfmt
libfs.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
locks.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
Makefile	Merge tag 'ofs-pull-tag-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux	2016-03-26 12:59:04 -07:00
mbcache.c	mbcache: add reusable flag to cache entries	2016-02-22 22:44:04 -05:00
mount.h
mpage.c	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
namei.c	fix the braino in "namei: massage lookup_slow() to be usable by lookup_one_len_unlocked()"	2016-03-31 00:23:05 -04:00
namespace.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
no-block.c
nsfs.c
open.c	fs/coredump: prevent fsuid=0 dumps into user-controlled directories	2016-03-22 15:36:02 -07:00
pipe.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
pnode.c	fs/pnode.c: treat zero mnt_group_id-s as unequal	2016-02-20 00:15:52 -05:00
pnode.h
posix_acl.c	xattr handlers: Simplify list operation	2015-12-13 19:46:12 -05:00
proc_namespace.c	vfs: show_vfsstat: do not ignore errors from show_devname method	2016-03-16 13:09:08 -04:00
read_write.c	Merge branches 'work.lookups', 'work.misc' and 'work.preadv2' into for-next	2016-03-18 16:07:38 -04:00
readdir.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
select.c	timer: convert timer_slack_ns from unsigned long to u64	2016-03-17 15:09:34 -07:00
seq_file.c	Make file credentials available to the seqfile interfaces	2016-04-14 12:56:09 -07:00
signalfd.c
splice.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
stack.c
stat.c	fs/stat.c: drop the last new_valid_dev check	2016-01-16 11:17:23 -08:00
statfs.c
super.c	writeback: flush inode cgroup wb switches instead of pinning super_block	2016-03-03 14:42:50 -07:00
sync.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
timerfd.c	timerfd: Handle relative timers with CONFIG_TIME_LOW_RES proper	2016-01-17 11:13:55 +01:00
userfaultfd.c	userfaultfd: don't block on the last VM updates at exit time	2016-03-02 09:03:18 -08:00
utimes.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
xattr.c	xattr handlers: plug a lock leak in simple_xattr_list	2016-02-20 00:15:51 -05:00