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Filipe Manana c79f57eafc btrfs: avoid pointless wake ups of drew lock readers 
When unlocking a write lock on a drew lock, at btrfs_drew_write_unlock(),
it's pointless to wake up tasks waiting to acquire a read lock if we
didn't decrement the 'writers' counter down to 0, since a read lock can
only be acquired when the counter reaches a value of 0. Doing so is
harmless from a functional point of view, but it's not efficient due to
unnecessarily waking up tasks just for them to sleep again on the
waitqueue.

So change this to wake up readers only if we decremented the 'writers'
counter to 0.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-05-07 21:31:00 +02:00
..
9p
fs/9p: mitigate inode collisions
2024-04-22 15:34:27 +00:00
adfs
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
affs
affs: remove SLAB_MEM_SPREAD flag usage
2024-02-26 11:36:28 +01:00
afs
afs: Fix occasional rmdir-then-VNOVNODE with generic/011
2024-03-14 12:13:21 +01:00
autofs
dcache stuff for this cycle
2024-01-11 20:11:35 -08:00
bcachefs
bcachefs: fix integer conversion bug
2024-04-28 21:34:29 -04:00
befs
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
bfs
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
btrfs
btrfs: avoid pointless wake ups of drew lock readers
2024-05-07 21:31:00 +02:00
cachefiles
cachefiles: fix memory leak in cachefiles_add_cache()
2024-02-20 09:46:07 +01:00
ceph
ceph: switch to use cap_delay_lock for the unlink delay list
2024-04-11 22:56:28 +02:00
coda
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
configfs
…
cramfs
fs,block: yield devices early
2024-03-27 13:17:15 +01:00
crypto
fscrypt updates for 6.9
2024-03-12 13:17:36 -07:00
debugfs
debugfs: fix wait/cancellation handling during remove
2024-03-07 22:08:15 +00:00
devpts
fs: Remove the now superfluous sentinel elements from ctl_table array
2023-12-28 04:57:57 -08:00
dlm
dlm for 6.9
2024-03-18 15:39:48 -07:00
ecryptfs
Merge tag 'exportfs-6.9' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/cel/linux
2024-01-23 17:56:30 +01:00
efivarfs
efivarfs: Drop 'duplicates' bool parameter on efivar_init()
2024-02-25 09:43:39 +01:00
efs
efs: remove SLAB_MEM_SPREAD flag usage
2024-02-27 11:21:33 +01:00
erofs
erofs: reliably distinguish block based and fscache mode
2024-04-28 20:36:52 +08:00
exfat
Description for this pull request:
2024-03-21 09:47:12 -07:00
exportfs
fs: Create a generic is_dot_dotdot() utility
2024-01-23 10:58:56 -05:00
ext2
\n
2024-03-13 14:30:58 -07:00
ext4
fs,block: yield devices early
2024-03-27 13:17:15 +01:00
f2fs
fs,block: yield devices early
2024-03-27 13:17:15 +01:00
fat
- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min
2024-03-14 18:03:09 -07:00
freevxfs
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
fuse
cuse: add kernel-doc comments to cuse_process_init_reply()
2024-04-15 11:02:10 +02:00
gfs2
gfs2 fix
2024-03-25 10:53:39 -07:00
hfs
hfs: really remove hfs_writepage
2023-12-29 11:58:34 -08:00
hfsplus
vfs-6.9.misc
2024-03-11 09:38:17 -07:00
hostfs
hostfs: use d_splice_alias() calling conventions to simplify failure exits
2023-12-21 12:51:00 -05:00
hpfs
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
hugetlbfs
vfs-6.9.misc
2024-03-11 09:38:17 -07:00
iomap
vfs-6.9.rw_hint
2024-03-04 18:35:21 +01:00
isofs
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
jbd2
jbd2: abort journal when detecting metadata writeback error of fs dev
2024-01-04 23:42:21 -05:00
jffs2
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
jfs
fs,block: yield devices early
2024-03-27 13:17:15 +01:00
kernfs
kernfs: annotate different lockdep class for of->mutex of writable files
2024-04-14 06:55:46 -04:00
lockd
NFSD 6.9 Release Notes
2024-03-12 14:27:37 -07:00
minix
minix: remove SLAB_MEM_SPREAD flag usage
2024-02-27 11:21:32 +01:00
netfs
netfs: Fix the pre-flush when appending to a file in writethrough mode
2024-04-26 14:56:18 +02:00
nfs
NFS client bugfixes for Linux 6.9
2024-04-29 12:07:37 -07:00
nfs_common
…
nfsd
nfsd-6.9 fixes:
2024-04-29 14:22:24 -07:00
nilfs2
nilfs2: fix OOB in nilfs_set_de_type
2024-04-16 15:39:52 -07:00
nls
…
notify
fanotify: allow freeze when waiting response for permission events
2024-03-07 12:59:51 +01:00
ntfs3
ntfs3: add legacy ntfs file operations
2024-04-23 09:39:07 +02:00
ocfs2
- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min
2024-03-14 18:03:09 -07:00
omfs
…
openpromfs
openpromfs: remove SLAB_MEM_SPREAD flag usage
2024-02-27 11:21:32 +01:00
orangefs
Julia Lawall reported this null pointer dereference, this should fix it.
2024-02-14 15:57:53 -05:00
overlayfs
ovl: relax WARN_ON in ovl_verify_area()
2024-03-17 15:59:41 +02:00
proc
mm: support page_mapcount() on page_has_type() pages
2024-04-24 19:34:26 -07:00
pstore
pstore/zone: Don't clear memory twice
2024-03-09 12:33:22 -08:00
qnx4
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
qnx6
qnx6: remove SLAB_MEM_SPREAD flag usage
2024-02-27 11:21:32 +01:00
quota
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
ramfs
ramfs: Initialize security of in-memory inodes
2024-01-26 09:08:16 -08:00
reiserfs
fs,block: yield devices early
2024-03-27 13:17:15 +01:00
romfs
fs,block: yield devices early
2024-03-27 13:17:15 +01:00
smb
smb3: fix lock ordering potential deadlock in cifs_sync_mid_result
2024-04-25 12:49:50 -05:00
squashfs
Squashfs: check the inode number is not the invalid value of zero
2024-04-16 15:39:50 -07:00
sysfs
fs: sysfs: Fix reference leak in sysfs_break_active_protection()
2024-04-11 15:16:48 +02:00
sysv
sysv: remove SLAB_MEM_SPREAD flag usage
2024-02-27 11:21:31 +01:00
tracefs
eventfs: Have "events" directory get permissions from its parent
2024-05-04 04:25:37 -04:00
ubifs
This pull request contains updates for UBI and UBIFS:
2024-03-21 15:09:29 -07:00
udf
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
ufs
mm, slab: remove last vestiges of SLAB_MEM_SPREAD
2024-03-12 20:32:19 -07:00
unicode
…
vboxsf
vboxsf: explicitly deny setlease attempts
2024-04-03 16:06:39 +02:00
verity
Networking changes for 6.9.
2024-03-12 17:44:08 -07:00
xfs
Bug fixes for 6.9-rc3:
2024-04-06 09:14:18 -07:00
zonefs
zonefs: Use str_plural() to fix Coccinelle warning
2024-04-10 07:23:47 +09:00
aio.c
aio: Fix null ptr deref in aio_complete() wakeup
2024-04-05 11:20:28 +02:00
anon_inodes.c
Merge branch 'kvm-guestmemfd' into HEAD
2023-11-14 08:31:31 -05:00
attr.c
lsm/stable-6.9 PR 20240312
2024-03-12 20:03:34 -07:00
backing-file.c
fs: Use KMEM_CACHE instead of kmem_cache_create
2024-02-02 13:11:50 +01:00
bad_inode.c
…
binfmt_elf_fdpic.c
binfmt: replace deprecated strncpy
2024-03-21 20:20:52 -07:00
binfmt_elf_test.c
…
binfmt_elf.c
…
binfmt_flat.c
…
binfmt_misc.c
execve updates for v6.7-rc1
2023-10-30 19:28:19 -10:00
binfmt_script.c
…
buffer.c
vfs-6.9.iomap
2024-03-11 10:07:03 -07:00
char_dev.c
As usual, lots of singleton and doubleton patches all over the tree and
2023-11-02 20:53:31 -10:00
compat_binfmt_elf.c
…
coredump.c
iov_iter: get rid of 'copy_mc' flag
2024-03-06 10:52:12 +01:00
d_path.c
…
dax.c
fs : Fix warning using plain integer as NULL
2023-11-18 15:00:01 +01:00
dcache.c
vfs-6.9.misc
2024-03-11 09:38:17 -07:00
direct-io.c
block, fs: Restore the per-bio/request data lifetime fields
2024-02-06 14:31:05 +01:00
drop_caches.c
…
eventfd.c
eventfd: strictly check the count parameter of eventfd_write to avoid inputting illegal strings
2024-02-08 10:12:26 +01:00
eventpoll.c
epoll: be better about file lifetimes
2024-05-05 14:00:48 -07:00
exec.c
execve fixes for v6.9-rc2
2024-03-27 09:57:30 -07:00
fcntl.c
vfs-6.9.iomap
2024-03-11 10:07:03 -07:00
fhandle.c
do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak
2024-01-22 15:33:38 +01:00
file_table.c
lsm/stable-6.9 PR 20240312
2024-03-12 20:03:34 -07:00
file.c
file: remove __receive_fd()
2023-12-12 14:24:14 +01:00
filesystems.c
…
fs_context.c
…
fs_parser.c
__fs_parse: Correct a documentation comment
2024-02-02 13:11:50 +01:00
fs_pin.c
…
fs_struct.c
…
fs_types.c
…
fs-writeback.c
writeback: move wb_wakeup_delayed defination to fs-writeback.c
2024-01-22 15:33:38 +01:00
fsopen.c
…
init.c
…
inode.c
bcachefs updates for 6.9
2024-03-15 09:00:09 -07:00
internal.h
pidfs: remove config option
2024-03-13 12:53:53 -07:00
ioctl.c
fs: Return ENOTTY directly if FS_IOC_GETUUID or FS_IOC_GETFSSYSFSPATH fail
2024-04-09 12:03:49 +02:00
Kconfig
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames
2024-03-14 17:43:30 -07:00
Kconfig.binfmt
…
kernel_read_file.c
…
libfs.c
pidfs: remove config option
2024-03-13 12:53:53 -07:00
locks.c
filelock: fix deadlock detection in POSIX locking
2024-02-20 09:53:33 +01:00
Makefile
vfs-6.9.pidfd
2024-03-11 10:21:06 -07:00
mbcache.c
vfs: remove SLAB_MEM_SPREAD flag usage
2024-02-27 11:21:31 +01:00
mnt_idmapping.c
fs/mnt_idmapping.c: Return -EINVAL when no map is written
2024-02-08 10:12:37 +01:00
mount.h
mounts: keep list of mounts in an rbtree
2023-11-18 14:56:16 +01:00
mpage.c
block, fs: Restore the per-bio/request data lifetime fields
2024-02-06 14:31:05 +01:00
namei.c
security: Place security_path_post_mknod() where the original IMA call was
2024-04-03 10:21:32 -07:00
namespace.c
fs: relax mount_setattr() permission checks
2024-02-07 21:16:29 +01:00
nsfs.c
pidfs: remove config option
2024-03-13 12:53:53 -07:00
open.c
lsm/stable-6.9 PR 20240312
2024-03-12 20:03:34 -07:00
pidfs.c
pidfs: remove config option
2024-03-13 12:53:53 -07:00
pipe.c
fs/pipe: Convert to lockdep_cmp_fn
2024-02-02 13:11:49 +01:00
pnode.c
mounts: keep list of mounts in an rbtree
2023-11-18 14:56:16 +01:00
pnode.h
…
posix_acl.c
lsm/stable-6.9 PR 20240312
2024-03-12 20:03:34 -07:00
proc_namespace.c
namespace: extract show_path() helper
2023-11-18 14:56:16 +01:00
read_write.c
fsnotify: optionally pass access range in file permission hooks
2023-12-12 16:20:02 +01:00
readdir.c
fsnotify: optionally pass access range in file permission hooks
2023-12-12 16:20:02 +01:00
remap_range.c
remap_range: merge do_clone_file_range() into vfs_clone_file_range()
2024-02-06 17:07:21 +01:00
select.c
fs/select: rework stack allocation hack for clang
2024-02-20 09:23:52 +01:00
seq_file.c
…
signalfd.c
…
splice.c
fs: use splice_copy_file_range() inline helper
2023-12-12 16:20:02 +01:00
stack.c
…
stat.c
vfs-6.8.mount
2024-01-08 10:57:34 -08:00
statfs.c
…
super.c
fs,block: yield devices early
2024-03-27 13:17:15 +01:00
sync.c
…
sysctls.c
fs: Remove the now superfluous sentinel elements from ctl_table array
2023-12-28 04:57:57 -08:00
timerfd.c
…
userfaultfd.c
userfaultfd: use per-vma locks in userfaultfd operations
2024-02-22 15:27:20 -08:00
utimes.c
…
xattr.c
evm: Move to LSM infrastructure
2024-02-15 23:43:47 -05:00