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Jens Axboe bda521624e io_uring: make CQ ring wakeups be more efficient 
For batched IO, it's not uncommon for waiters to ask for more than 1
IO to complete before being woken up. This is a problem with
wait_event() since tasks will get woken for every IO that completes,
re-check condition, then go back to sleep. For batch counts on the
order of what you do for high IOPS, that can result in 10s of extra
wakeups for the waiting task.

Add a private wake function that checks for the wake up count criteria
being met before calling autoremove_wake_function(). Pavel reports that
one test case he has runs 40% faster with proper batching of wakeups.

Reported-by: Pavel Begunkov <asml.silence@gmail.com>
Tested-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-26 03:55:40 -06:00
..
9p
9p: pass the correct prototype to read_cache_page
2019-07-12 11:05:43 -07:00
adfs
Merge branch 'work.adfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 11:33:22 -07:00
affs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
afs
afs: use correct afs_call_type in yfs_fs_store_opaque_acl2
2019-08-22 13:33:27 +01:00
autofs
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 83
2019-05-24 17:37:52 +02:00
befs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
bfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
btrfs
for-5.3-rc4-tag
2019-08-18 09:51:48 -07:00
cachefiles
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
ceph
ceph: don't try fill file_lock on unsuccessful GETFILELOCK reply
2019-08-22 10:47:41 +02:00
cifs
signal: Allow cifs and drbd to receive their terminating signals
2019-08-19 06:34:13 -05:00
coda
coda: add hinting support for partial file caching
2019-07-16 19:23:23 -07:00
configfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
cramfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
crypto
Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"
2019-07-10 18:43:43 -07:00
debugfs
Driver Core and debugfs changes for 5.3-rc1
2019-07-12 12:24:03 -07:00
devpts
devpts: call fsnotify_unlink() hook
2019-06-20 14:46:34 +02:00
dlm
dlm for 5.3
2019-07-12 17:37:53 -07:00
ecryptfs
- Fix error handling when ecryptfs_read_lower() encounters an error
2019-07-14 19:29:04 -07:00
efivarfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
efs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
exportfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
ext2
New for 5.3:
2019-07-12 16:54:37 -07:00
ext4
- virtio_pmem: The new virtio_pmem facility introduces a paravirtualized
2019-07-18 10:52:08 -07:00
f2fs
f2fs-for-5.4-rc3
2019-07-30 13:15:39 -07:00
fat
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282
2019-06-05 17:36:37 +02:00
freevxfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
fscache
Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"
2019-07-10 18:43:43 -07:00
fuse
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
gfs2
gfs2: gfs2_walk_metadata fix
2019-08-09 16:56:12 +01:00
hfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
hfsplus
fs/hfsplus/xattr.c: replace strncpy with memcpy
2019-07-16 19:23:23 -07:00
hostfs
This pull request contains the following changes for UML:
2019-05-12 17:52:13 -04:00
hpfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
hugetlbfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
iomap
iomap: fix Invalid License ID
2019-07-25 11:05:11 +02:00
isofs
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 142
2019-05-30 11:25:17 -07:00
jbd2
jbd2: drop declaration of journal_sync_buffer()
2019-06-20 17:32:21 -04:00
jffs2
jffs2: pass the correct prototype to read_cache_page
2019-07-12 11:05:43 -07:00
jfs
vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
2019-07-01 08:25:34 -07:00
kernfs
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428
2019-06-05 17:37:16 +02:00
lockd
lockd: Make two symbols static
2019-07-03 17:52:09 -04:00
minix
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
nfs
NFSv4: Ensure state recovery handles ETIMEDOUT correctly
2019-08-07 12:55:11 -04:00
nfs_common
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
nfsd
nfsd4: Fix kernel crash when reading proc file reply_cache_stats
2019-08-16 13:36:55 -04:00
nilfs2
vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
2019-07-01 08:25:34 -07:00
nls
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
notify
proc/sysctl: add shared variables for range check
2019-07-18 17:08:07 -07:00
ntfs
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 97
2019-05-24 17:37:53 +02:00
ocfs2
ocfs2: remove set but not used variable 'last_hash'
2019-08-03 07:02:00 -07:00
omfs
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 209
2019-05-30 11:29:53 -07:00
openpromfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
orangefs
orangefs: This simple pull request is just a fix for an
2019-07-16 15:15:29 -07:00
overlayfs
SPDX update for 5.2-rc6
2019-06-21 09:58:42 -07:00
proc
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
pstore
pstore: Fix double-free in pstore_mkfile() failure path
2019-07-08 21:04:42 -07:00
qnx4
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
qnx6
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
quota
\n
2019-07-10 20:27:07 -07:00
ramfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
reiserfs
fs/reiserfs/journal.c: change return type of dirty_one_transaction
2019-07-16 19:23:24 -07:00
romfs
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
squashfs
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499
2019-06-19 17:09:53 +02:00
sysfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
sysv
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
tracefs
\n
2019-07-10 20:09:17 -07:00
ubifs
ubifs: Limit the number of pages in shrink_liability
2019-08-22 17:25:33 +02:00
udf
\n
2019-07-10 20:27:07 -07:00
ufs
fs/ufs/super.c: remove set but not used variable 'usb3'
2019-07-16 19:23:23 -07:00
unicode
Many bug fixes and cleanups, and an optimization for case-insensitive
2019-07-10 21:06:01 -07:00
xfs
xfs: fix missing ILOCK unlock when xfs_setattr_nonsize fails due to EDQUOT
2019-08-22 20:55:54 -07:00
aio.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
anon_inodes.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
attr.c
…
bad_inode.c
…
binfmt_aout.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
binfmt_elf_fdpic.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
binfmt_elf.c
fs/binfmt_elf.c: delete stale comment
2019-07-16 19:23:22 -07:00
binfmt_em86.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
binfmt_flat.c
fs/binfmt_flat.c: remove set but not used variable 'inode'
2019-07-16 19:23:22 -07:00
binfmt_misc.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
binfmt_script.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
block_dev.c
block: remove REQ_NOWAIT_INLINE
2019-08-15 11:09:16 -06:00
buffer.c
for-linus-20190715
2019-07-15 21:20:52 -07:00
char_dev.c
chardev: set variable ret to -EBUSY before checking minor range overlap
2019-05-24 20:50:36 +02:00
compat_binfmt_elf.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193
2019-05-30 11:29:21 -07:00
compat_ioctl.c
compat_ioctl: pppoe: fix PPPOEIOCSFWD handling
2019-07-30 14:42:13 -07:00
compat.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
coredump.c
coredump: split pipe command whitespace before expanding template
2019-08-03 07:02:01 -07:00
d_path.c
unexport simple_dname()
2019-05-21 08:23:41 +01:00
dax.c
dax: dax_layout_busy_page() should not unmap cow pages
2019-08-05 14:59:05 -07:00
dcache.c
Merge branch 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-20 09:15:51 -07:00
dcookies.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
direct-io.c
direct-io: use bio_release_pages in dio_bio_complete
2019-06-29 09:47:31 -06:00
drop_caches.c
…
eventfd.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
eventpoll.c
proc/sysctl: add shared variables for range check
2019-07-18 17:08:07 -07:00
exec.c
sched/fair: Don't free p->numa_faults with concurrent readers
2019-07-25 15:37:04 +02:00
fcntl.c
fs: mark expected switch fall-throughs
2019-04-08 18:21:02 -05:00
fhandle.c
…
file_table.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
file.c
io_uring-2019-03-06
2019-03-08 14:48:40 -08:00
filesystems.c
vfs: Implement a filesystem superblock creation/configuration context
2019-02-28 03:29:26 -05:00
fs_context.c
move mount_capable() calls to vfs_get_tree()
2019-05-25 18:00:01 -04:00
fs_parser.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
fs_pin.c
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
fs_struct.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
fs_types.c
…
fs-writeback.c
blkcg, writeback: Add wbc->no_cgroup_owner
2019-07-10 09:00:57 -06:00
fsopen.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
inode.c
New for 5.3:
2019-07-12 16:54:37 -07:00
internal.h
Merge branch 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-20 09:15:51 -07:00
io_uring.c
io_uring: make CQ ring wakeups be more efficient
2019-09-26 03:55:40 -06:00
ioctl.c
…
Kconfig
fs: VALIDATE_FS_PARSER should default to n
2019-07-05 11:22:11 -04:00
Kconfig.binfmt
binfmt_flat: make support for old format binaries optional
2019-06-24 09:16:47 +10:00
libfs.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
locks.c
Highlights:
2019-07-10 21:22:43 -07:00
Makefile
iomap: move the main iteration code into a separate file
2019-07-17 07:20:43 -07:00
mbcache.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
mount.h
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
mpage.c
blkcg, writeback: Rename wbc_account_io() to wbc_account_cgroup_owner()
2019-07-10 09:00:57 -06:00
namei.c
fsnotify: add empty fsnotify_{unlink,rmdir}() hooks
2019-06-20 14:44:55 +02:00
namespace.c
fix the struct mount leak in umount_tree()
2019-07-26 07:59:06 -04:00
no-block.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
nsfs.c
vfs: Convert nsfs to use the new mount API
2019-05-25 18:00:06 -04:00
open.c
access: avoid the RCU grace period for the temporary subjective credentials
2019-07-24 10:12:09 -07:00
pipe.c
vfs: Convert pipe to use the new mount API
2019-05-25 18:00:07 -04:00
pnode.c
fs/namespace: fix unprivileged mount propagation
2019-06-17 17:36:09 -04:00
pnode.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 209
2019-05-30 11:29:53 -07:00
posix_acl.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
proc_namespace.c
…
read_write.c
vfs: fix page locking deadlocks when deduping files
2019-08-16 18:43:24 -07:00
readdir.c
…
select.c
fs/select.c: use struct_size() in kmalloc()
2019-07-16 19:23:25 -07:00
seq_file.c
seq_file: fix problem when seeking mid-record
2019-08-13 16:06:52 -07:00
signalfd.c
fs: mark expected switch fall-throughs
2019-04-08 18:21:02 -05:00
splice.c
uio: make import_iovec()/compat_import_iovec() return bytes on success
2019-05-31 15:30:03 -06:00
stack.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
stat.c
…
statfs.c
…
super.c
Unbreak mount_capable()
2019-07-31 12:22:32 -04:00
sync.c
fs/sync.c: sync_file_range(2) may use WB_SYNC_ALL writeback
2019-05-14 09:47:50 -07:00
timerfd.c
…
userfaultfd.c
userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx
2019-08-24 19:48:42 -07:00
utimes.c
…
xattr.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00