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Xiaoguang Wang c7849be9cc io_uring: fix __io_iopoll_check deadlock in io_sq_thread 
Since commit a3a0e43fd770 ("io_uring: don't enter poll loop if we have
CQEs pending"), if we already events pending, we won't enter poll loop.
In case SETUP_IOPOLL and SETUP_SQPOLL are both enabled, if app has
been terminated and don't reap pending events which are already in cq
ring, and there are some reqs in poll_list, io_sq_thread will enter
__io_iopoll_check(), and find pending events, then return, this loop
will never have a chance to exit.

I have seen this issue in fio stress tests, to fix this issue, let
io_sq_thread call io_iopoll_getevents() with argument 'min' being zero,
and remove __io_iopoll_check().

Fixes: a3a0e43fd770 ("io_uring: don't enter poll loop if we have CQEs pending")
Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-02-22 07:45:03 -07:00
..
9p
9p pull request for inclusion in 5.4
2019-09-27 15:10:34 -07:00
adfs
fs/adfs: bigdir: Fix an error code in adfs_fplus_read()
2020-01-25 11:31:59 -05:00
affs
affs: fix a memory leak in affs_remount
2019-11-18 14:26:43 +01:00
afs
Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:26:41 -08:00
autofs
Merge branch 'next.autofs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-12-05 17:11:48 -08:00
befs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
bfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
btrfs
for-5.6-tag
2020-02-03 17:03:42 +00:00
cachefiles
cachefiles: drop direct usage of ->bmap method.
2020-02-03 08:05:56 -05:00
ceph
ceph: noacl mount option is effectively ignored
2020-02-11 17:04:40 +01:00
cifs
13 cifs/smb3 patches most from testing at the SMB3 plugfest this week
2020-02-09 13:27:17 -08:00
coda
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
configfs
utimes: Clamp the timestamps in notify_change()
2019-12-08 19:10:50 -05:00
cramfs
cramfs: switch to use of errofc() et.al.
2020-02-07 14:48:41 -05:00
crypto
fscrypt: improve format of no-key names
2020-01-22 14:50:03 -08:00
debugfs
Merge branch 'work.recursive_removal' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-05 05:09:46 +00:00
devpts
devpts_pty_kill(): don't bother with d_delete()
2019-09-03 09:30:56 -04:00
dlm
dlm: use SO_SNDTIMEO_NEW instead of SO_SNDTIMEO_OLD
2019-12-18 18:07:31 +01:00
ecryptfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:04:49 -08:00
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
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
erofs
erofs: clean up z_erofs_submit_queue()
2020-01-21 16:46:23 +08:00
exportfs
race in exportfs_decode_fh()
2019-11-11 09:21:59 -05:00
ext2
dax fixes 5.6-rc1
2020-02-11 16:52:08 -08:00
ext4
dax fixes 5.6-rc1
2020-02-11 16:52:08 -08:00
f2fs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:04:49 -08:00
fat
Merge branch 'imm.timestamp' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-05 05:02:42 +00:00
freevxfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
fscache
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
fuse
Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:26:41 -08:00
gfs2
Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:26:41 -08:00
hfs
hfs/hfsplus: use 64-bit inode timestamps
2019-12-18 18:07:32 +01:00
hfsplus
hfs/hfsplus: use 64-bit inode timestamps
2019-12-18 18:07:32 +01:00
hostfs
hostfs: pass 64-bit timestamps to/from user space
2019-12-18 18:07:32 +01:00
hpfs
fs: compat_ioctl: move FITRIM emulation into file systems
2019-10-23 17:23:46 +02:00
hugetlbfs
hugetlbfs: switch to use of invalfc()
2020-02-07 14:48:42 -05:00
iomap
fs: Fix page_mkwrite off-by-one errors
2020-01-06 08:58:23 -08:00
isofs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
jbd2
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:04:49 -08:00
jffs2
fs_parse: fold fs_parameter_desc/fs_parameter_spec
2020-02-07 14:48:37 -05:00
jfs
Trivial cleanup for jfs
2020-02-05 05:28:20 +00:00
kernfs
Merge branch 'imm.timestamp' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-05 05:02:42 +00:00
lockd
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
minix
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
nfs
NFSv4: Ensure the delegation cred is pinned when we call delegreturn
2020-02-13 16:23:02 -05:00
nfs_common
…
nfsd
Highlights:
2020-02-07 17:50:21 -08:00
nilfs2
fs: compat_ioctl: move FITRIM emulation into file systems
2019-10-23 17:23:46 +02:00
nls
…
notify
fs: call fsnotify_sb_delete after evict_inodes
2019-12-18 00:03:01 -05:00
ntfs
utimes: Clamp the timestamps in notify_change()
2019-12-08 19:10:50 -05:00
ocfs2
treewide: remove redundant IS_ERR() before error code check
2020-02-04 03:05:27 +00:00
omfs
fs: omfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -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
help_next should increase position index
2020-02-04 15:22:04 -05:00
overlayfs
ovl: fix lseek overflow on 32bit
2020-02-03 11:41:53 +01:00
proc
Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:26:41 -08:00
pstore
pstore/ram: Regularize prz label allocation lifetime
2020-01-08 17:05:45 -08:00
qnx4
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
qnx6
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
quota
\n
2020-01-30 15:37:41 -08:00
ramfs
fs_parse: fold fs_parameter_desc/fs_parameter_spec
2020-02-07 14:48:37 -05:00
reiserfs
Merge branch 'akpm' (patches from Andrew)
2020-01-31 12:16:36 -08:00
romfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
squashfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
sysfs
treewide: remove redundant IS_ERR() before error code check
2020-02-04 03:05:27 +00:00
sysv
fs: sysv: Initialize filesystem timestamp ranges
2019-08-30 07:27:18 -07:00
tracefs
simple_recursive_removal(): kernel-side rm -rf for ramfs-style filesystems
2019-12-10 22:29:58 -05:00
ubifs
Merge branch 'imm.timestamp' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-05 05:02:42 +00:00
udf
udf: Clarify meaning of f_files in udf_statfs
2020-01-20 13:59:41 +01:00
ufs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
unicode
kbuild: rename hostprogs-y/always to hostprogs/always-y
2020-02-04 01:53:07 +09:00
vboxsf
fs: Add VirtualBox guest shared folder (vboxsf) support
2020-02-08 17:34:58 -05:00
verity
fs-verity: use u64_to_user_ptr()
2020-01-14 13:28:28 -08:00
xfs
dax fixes 5.6-rc1
2020-02-11 16:52:08 -08:00
zonefs
fs: New zonefs file system
2020-02-07 14:39:38 +09:00
aio.c
aio: prevent potential eventfd recursion on poll
2020-02-03 17:27:47 -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
utimes: Clamp the timestamps in notify_change()
2019-12-08 19:10:50 -05:00
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
y2038: elfcore: Use __kernel_old_timeval for process times
2019-11-15 14:38:29 +01:00
binfmt_elf.c
fs/binfmt_elf.c: coredump: allow process with empty address space to coredump
2020-01-31 10:30:41 -08:00
binfmt_em86.c
…
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
…
block_dev.c
block: don't send uevent for empty disk when not invalidating
2019-12-02 18:49:30 -07:00
buffer.c
smp: Remove allocation mask from on_each_cpu_cond.*()
2020-01-24 20:40:09 +01:00
char_dev.c
chardev: Avoid potential use-after-free in 'chrdev_open()'
2020-01-06 20:10:26 +01:00
compat_binfmt_elf.c
y2038: elfcore: Use __kernel_old_timeval for process times
2019-11-15 14:38:29 +01:00
compat.c
…
coredump.c
pipe: use exclusive waits when reading or writing
2020-02-08 11:39:19 -08:00
d_path.c
[PATCH] fix d_absolute_path() interplay with fsmount()
2019-08-30 19:31:09 -04:00
dax.c
dax: pass NOWAIT flag to iomap_apply
2020-02-05 20:34:32 -08:00
dcache.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-12-08 11:08:28 -08:00
dcookies.c
…
direct-io.c
fs/direct-io.c: include fs/internal.h for missing prototype
2020-01-04 13:55:09 -08:00
drop_caches.c
fs: avoid softlockups in s_inodes iterators
2019-12-18 00:03:01 -05:00
eventfd.c
eventfd: track eventfd_signal() recursion depth
2020-02-03 17:27:38 -07:00
eventpoll.c
eventpoll: support non-blocking do_epoll_ctl() calls
2020-01-29 15:45:47 -07:00
exec.c
Merge branch 'akpm' (patches from Andrew)
2020-01-31 12:16:36 -08:00
fcntl.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-12-08 11:08:28 -08:00
fhandle.c
fs/handle.c - fix up kerneldoc
2019-08-07 21:51:47 -04:00
file_table.c
vfs: Export flush_delayed_fput for use by knfsd.
2019-08-19 11:00:39 -04:00
file.c
threads-v5.6
2020-01-29 19:38:34 -08:00
filesystems.c
fs_parser: remove fs_parameter_description name field
2020-02-07 14:48:36 -05:00
fs_context.c
add prefix to fs_context->log
2020-02-07 14:48:35 -05:00
fs_parser.c
turn fs_param_is_... into functions
2020-02-07 14:48:38 -05:00
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
…
fs_types.c
…
fs-writeback.c
memcg: fix a crash in wb_workfn when a device disappears
2020-01-31 10:30:36 -08:00
fsopen.c
add prefix to fs_context->log
2020-02-07 14:48:35 -05:00
inode.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-02-08 13:04:49 -08:00
internal.h
for-5.6/io_uring-vfs-2020-01-29
2020-01-29 18:53:37 -08:00
io_uring.c
io_uring: fix __io_iopoll_check deadlock in io_sq_thread
2020-02-22 07:45:03 -07:00
io-wq.c
io-wq: don't call kXalloc_node() with non-online node
2020-02-12 17:43:22 -07:00
io-wq.h
io-wq: add io_wq_cancel_pid() to cancel based on a specific pid
2020-02-09 09:55:38 -07:00
ioctl.c
compat-ioctl fix for v5.6
2020-02-08 13:44:41 -08:00
Kconfig
fs: New zonefs file system
2020-02-09 15:51:46 -08:00
Kconfig.binfmt
…
libfs.c
simple_recursive_removal(): kernel-side rm -rf for ramfs-style filesystems
2019-12-10 22:29:58 -05:00
locks.c
locks: print unsigned ino in /proc/locks
2019-12-29 09:00:58 -05:00
Makefile
fs: New zonefs file system
2020-02-09 15:51:46 -08:00
mbcache.c
…
mount.h
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
mpage.c
fs: move guard_bio_eod() after bio_set_op_attrs
2020-01-09 08:16:12 -07:00
namei.c
vfs: fix do_last() regression
2020-02-01 10:36:49 -08:00
namespace.c
saner copy_mount_options()
2020-02-03 21:23:33 -05:00
no-block.c
…
nsfs.c
Merge branch 'work.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-01-29 11:20:24 -08:00
open.c
fs: make build_open_flags() available internally
2020-01-20 17:01:53 -07:00
pipe.c
pipe: use exclusive waits when reading or writing
2020-02-08 11:39:19 -08:00
pnode.c
…
pnode.h
…
posix_acl.c
fs/posix_acl.c: fix kernel-doc warnings
2020-01-04 13:55:09 -08:00
proc_namespace.c
vfs: subtype handling moved to fuse
2019-09-06 21:28:49 +02:00
read_write.c
overlayfs update for 5.6
2020-02-04 11:45:21 +00:00
readdir.c
readdir: make user_access_begin() use the real access range
2020-01-23 10:15:28 -08:00
select.c
y2038: syscalls: change remaining timeval to __kernel_old_timeval
2019-11-15 14:38:29 +01:00
seq_file.c
seq_file: fix problem when seeking mid-record
2019-08-13 16:06:52 -07:00
signalfd.c
…
splice.c
pipe: use exclusive waits when reading or writing
2020-02-08 11:39:19 -08:00
stack.c
sched/rt, fs: Use CONFIG_PREEMPTION
2019-12-08 14:37:36 +01:00
stat.c
fs: make two stat prep helpers available
2020-01-20 17:03:54 -07:00
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-03 14:21:35 -07:00
super.c
fs: call fsnotify_sb_delete after evict_inodes
2019-12-18 00:03:01 -05:00
sync.c
…
timerfd.c
timerfd: Make timerfd_settime() time namespace aware
2020-01-14 12:20:53 +01:00
userfaultfd.c
Merge branch 'akpm' (patches from Andrew)
2019-12-01 20:36:41 -08:00
utimes.c
utimes: Clamp the timestamps in notify_change()
2019-12-08 19:10:50 -05:00
xattr.c
…