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Nikolay Borisov 46cc775e29 btrfs: Adjust loop in free_extent_buffer 
The loop construct in free_extent_buffer was added in
242e18c7c1a8 ("Btrfs: reduce lock contention on extent buffer locks")
as means of reducing the times the eb lock is taken, the non-last ref
count is decremented and lock is released. As the special handling
of UNMAPPED extent buffers was removed now there is only one decrement
op which is happening for EXTENT_BUFFER_UNMAPPED case.

This commit modifies the loop condition so that in case of UNMAPPED
buffers the eb's lock is taken only if we are 100% sure the eb is going
to be freed by the current executor of the code. Additionally, remove
superfluous ref count ops in btrfs test.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-12-17 14:51:31 +01:00
..
9p
Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-11-01 19:58:52 -07:00
adfs
adfs: use timespec64 for time conversion
2018-08-22 10:52:51 -07:00
affs
affs: fix potential memory leak when parsing option 'prefix'
2018-05-28 12:36:41 +02:00
afs
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-11-30 10:47:50 -08:00
autofs
Merge branch 'akpm' (patches from Andrew)
2018-08-22 12:34:08 -07:00
befs
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
bfs
bfs: add sanity check at bfs_fill_super()
2018-11-03 10:09:38 -07:00
btrfs
btrfs: Adjust loop in free_extent_buffer
2018-12-17 14:51:31 +01:00
cachefiles
fscache, cachefiles: remove redundant variable 'cache'
2018-11-30 16:00:58 +00:00
ceph
ceph: make 'nocopyfrom' a default mount option
2018-12-11 18:22:17 +01:00
cifs
CIFS: Avoid returning EBUSY to upper layer VFS
2018-12-07 00:59:23 -06:00
coda
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
configfs
configfs: fix registered group removal
2018-07-17 06:14:07 -07:00
cramfs
Make the Cramfs code more robust against filesystem corruptions,
2018-10-30 12:46:25 -07:00
crypto
crypto: speck - remove Speck
2018-09-04 11:35:03 +08:00
debugfs
Revert "debugfs: inode: debugfs_create_dir uses mode permission from parent"
2018-06-12 20:52:16 -07:00
devpts
devpts: Convert to new IDA API
2018-08-21 23:54:17 -04:00
dlm
iov_iter: Separate type from direction and use accessor functions
2018-10-24 00:41:07 +01:00
ecryptfs
ecryptfs_rename(): verify that lower dentries are still OK after lock_rename()
2018-10-09 23:33:17 -04:00
efivarfs
efivars: Call guid_parse() against guid_t type of variable
2018-07-22 14:13:44 +02:00
efs
…
exofs
fs/exofs: only use true/false for asignment of bool type variable
2018-10-18 02:04:59 -04:00
exportfs
exportfs: do not read dentry after free
2018-11-23 09:08:17 -05:00
ext2
ext2: fix potential use after free
2018-11-27 10:21:15 +01:00
ext4
A large number of ext4 bug fixes, mostly buffer and memory leaks on
2018-11-11 16:53:02 -06:00
f2fs
Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax
2018-10-28 11:35:40 -07:00
fat
fat: truncate inode timestamp updates in setattr
2018-10-31 08:54:14 -07:00
freevxfs
freevxfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
fscache
fscache: fix race between enablement and dropping of object
2018-11-30 15:57:31 +00:00
fuse
fuse: continue to send FUSE_RELEASEDIR when FUSE_OPEN returns ENOSYS
2018-12-11 21:47:28 +01:00
gfs2
Merge tag 'gfs2-4.20.fixes3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
2018-11-16 11:38:14 -06:00
hfs
hfs: do not free node before using
2018-11-30 14:56:14 -08:00
hfsplus
hfsplus: do not free node before using
2018-11-30 14:56:14 -08:00
hostfs
vfs: discard ATTR_ATTR_FLAG
2018-08-17 16:20:28 -07:00
hpfs
hpfs: remove unnecessary checks on the value of r when assigning error code
2018-08-25 12:42:33 -07:00
hugetlbfs
mm: zero out the vma in vma_init()
2018-08-22 10:52:44 -07:00
isofs
Update email address
2018-09-29 22:47:48 -04:00
jbd2
jbd2: fix use after free in jbd2_log_do_checkpoint()
2018-10-05 18:44:40 -04:00
jffs2
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-10-24 11:22:39 +01:00
jfs
jfs: remove redundant dquot_initialize() in jfs_evict_inode()
2018-09-20 09:28:49 -05:00
kernfs
mm: zero-seek shrinkers
2018-10-26 16:26:33 -07:00
lockd
lockd: fix access beyond unterminated strings in prints
2018-10-29 16:58:04 -04:00
minix
minix_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
nfs
nfs: don't dirty kernel pages read by direct-io
2018-12-02 09:43:56 -05:00
nfs_common
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
nfsd
nfsd: COPY and CLONE operations require the saved filehandle to be set
2018-11-08 12:11:45 -05:00
nilfs2
nilfs2: Use xa_erase_irq
2018-11-05 14:57:05 -05:00
nls
…
notify
fanotify: fix handling of events on child sub-directory
2018-11-08 15:43:48 +01:00
ntfs
ntfs: don't open-code ERR_CAST
2018-10-12 22:46:50 -04:00
ocfs2
ocfs2: fix potential use after free
2018-11-30 14:56:15 -08:00
omfs
omfs_lookup(): report IO errors, use d_splice_alias()
2018-05-22 14:27:58 -04:00
openpromfs
openpromfs: switch to d_splice_alias()
2018-05-22 14:27:57 -04:00
orangefs
Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-11-01 19:58:52 -07:00
overlayfs
Revert "ovl: relax permission checking on underlying layers"
2018-12-04 11:31:30 +01:00
proc
New gcc plugin: stackleak
2018-11-01 11:46:27 -07:00
pstore
pstore fix:
2018-11-30 09:03:15 -08:00
qnx4
qnx4_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
qnx6
qnx6_lookup: switch to d_splice_alias()
2018-05-22 14:27:54 -04:00
quota
fs/quota: Fix spectre gadget in do_quotactl
2018-08-22 18:17:48 +02:00
ramfs
…
reiserfs
reiserfs: remove workaround code for GCC 3.x
2018-10-31 08:54:14 -07:00
romfs
romfs_lookup: switch to d_splice_alias()
2018-05-22 14:27:55 -04:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-08-02 09:34:02 -07:00
sysfs
Driver core patches for 4.19-rc1
2018-08-18 11:44:53 -07:00
sysv
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-11-10 08:02:40 -05:00
tracefs
tracefs: Annotate tracefs_ops with __ro_after_init
2018-07-31 11:32:44 -04:00
ubifs
ubifs: Remove unneeded semicolon
2018-10-23 13:49:02 +02:00
udf
udf: Allow mounting volumes with incorrect identification strings
2018-11-19 10:27:59 +01:00
ufs
fs/ufs: use ktime_get_real_seconds for sb and cg timestamps
2018-08-17 16:20:27 -07:00
xfs
xfs: fix inverted return from xfs_btree_sblock_verify_crc
2018-12-04 08:50:49 -08:00
aio.c
for-linus-20181214
2018-12-14 12:18:30 -08:00
anon_inodes.c
anon_inode_getfile(): switch to alloc_file_pseudo()
2018-07-12 10:04:27 -04:00
attr.c
fs: Fix attr.c kernel-doc
2018-07-03 16:44:45 -04:00
bad_inode.c
get rid of 'opened' argument of ->atomic_open() - part 3
2018-07-12 10:04:20 -04:00
binfmt_aout.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_elf_fdpic.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
binfmt_elf.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
binfmt_em86.c
…
binfmt_flat.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_misc.c
turn filp_clone_open() into inline wrapper for dentry_open()
2018-07-10 23:29:03 -04:00
binfmt_script.c
…
block_dev.c
iov_iter: Use accessor function
2018-10-24 00:40:44 +01:00
buffer.c
for-linus-20181102
2018-11-02 11:25:48 -07:00
char_dev.c
block, char_dev: Use correct format specifier for unsigned ints
2018-03-15 17:59:24 +01:00
compat_binfmt_elf.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
compat_ioctl.c
media updates for v4.20-rc1
2018-10-29 14:29:58 -07:00
compat.c
ncpfs: remove compat functionality
2018-06-05 19:23:26 +02:00
coredump.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
d_path.c
split d_path() and friends into a separate file
2018-03-29 15:07:46 -04:00
dax.c
dax: Fix unlock mismatch with updated API
2018-12-04 21:32:00 -08:00
dcache.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
dcookies.c
fs: add do_lookup_dcookie() helper; remove in-kernel call to syscall
2018-04-02 20:15:39 +02:00
direct-io.c
fs: fix lost error code in dio_complete
2018-11-30 08:35:14 -07:00
drop_caches.c
…
eventfd.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
eventpoll.c
fs/eventpoll.c: simplify ep_is_linked() callers
2018-08-22 10:52:49 -07:00
exec.c
Revert "exec: make de_thread() freezable"
2018-12-04 16:04:20 +01:00
fcntl.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
fhandle.c
…
file_table.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
file.c
fs: add ksys_close() wrapper; remove in-kernel calls to sys_close()
2018-04-02 20:16:00 +02:00
filesystems.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
fs: Convert writeback to XArray
2018-10-21 10:46:42 -04:00
inode.c
mm: don't reclaim inodes with many attached pages
2018-11-18 10:15:09 -08:00
internal.h
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
ioctl.c
vfs: rework data cloning infrastructure
2018-11-02 09:33:08 -07:00
iomap.c
fs/iomap.c: get/put the page in iomap_page_create/release()
2018-12-14 15:05:45 -08:00
Kconfig
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
Kconfig.binfmt
kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt
2018-08-02 08:06:55 +09:00
libfs.c
fs, dax: prepare for dax-specific address_space_operations
2018-03-30 11:34:55 -07:00
locks.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
Makefile
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
mbcache.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mount.h
…
mpage.c
mpage: mpage_readpages() should submit IO as read-ahead
2018-08-17 16:20:29 -07:00
namei.c
namei: allow restricted O_CREAT of FIFOs and regular files
2018-08-23 18:48:43 -07:00
namespace.c
mnt: fix __detach_mounts infinite loop
2018-11-12 01:02:34 -06:00
no-block.c
…
nsfs.c
…
open.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
pipe.c
Merge branch 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-08-13 19:58:36 -07:00
pnode.c
…
pnode.h
…
posix_acl.c
…
proc_namespace.c
…
read_write.c
vfs: allow some remap flags to be passed to vfs_clone_file_range
2018-12-04 08:50:49 -08:00
readdir.c
fs: add ksys_getdents64() helper; remove in-kernel calls to sys_getdents64()
2018-04-02 20:16:02 +02:00
select.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
seq_file.c
fs/seq_file.c: simplify seq_file iteration code and interface
2018-08-17 16:20:28 -07:00
signalfd.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
splice.c
splice: don't read more than available pipe space
2018-12-04 08:50:49 -08:00
stack.c
…
stat.c
y2038: Remove newstat family from default syscall set
2018-08-29 15:42:20 +02:00
statfs.c
kernel: add kcompat_sys_{f,}statfs64()
2018-07-12 14:49:48 +01:00
super.c
fsnotify: add super block object type
2018-09-03 15:14:01 +02:00
sync.c
Changes for this release:
2018-04-04 12:44:02 -07:00
timerfd.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
userfaultfd.c
userfaultfd: check VM_MAYWRITE was set after verifying the uffd is registered
2018-12-14 15:05:45 -08:00
utimes.c
y2038: utimes: Rework #ifdef guards for compat syscalls
2018-08-29 15:42:23 +02:00
xattr.c
sysfs: Do not return POSIX ACL xattrs via listxattr
2018-09-18 07:30:48 -04:00