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linux-stable/io_uring
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Pavel Begunkov 13bfa6f15d io_uring: remove extra tw trylocks 
Before cond_resched()'ing in handle_tw_list() we also drop the current
ring context, and so the next loop iteration will need to pick/pin a new
context and do trylock.

The chunk removed by this patch was intended to be an optimisation
covering exactly this case, i.e. retaking the lock after reschedule, but
in reality it's skipped for the first iteration after resched as
described and will keep hammering the lock if it's contended.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/1ecec9483d58696e248d1bfd52cf62b04442df1d.1679931367.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 		2023-04-03 07:16:15 -06:00
..
Makefile
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advise.c io_uring: always go async for unsupported fadvise flags 2023-01-29 15:18:26 -07:00
advise.h
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alloc_cache.h io_uring: Add KASAN support for alloc_caches 2023-04-03 07:16:14 -06:00
cancel.c io_uring/cancel: re-grab ctx mutex after finishing wait 2022-12-21 13:31:40 -07:00
cancel.h
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epoll.c io_uring: make io_kiocb_to_cmd() typesafe 2022-08-12 17:01:00 -06:00
epoll.h
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fdinfo.c capability: just use a 'u64' instead of a 'u32[2]' array 2023-03-01 10:01:22 -08:00
fdinfo.h
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filetable.c io_uring/rsrc: fix null-ptr-deref in io_file_bitmap_get() 2023-03-22 11:04:55 -06:00
filetable.h io_uring: kill hot path fixed file bitmap debug checks 2022-10-16 17:07:53 -06:00
fs.c io_uring: for requests that require async, force it 2023-01-29 15:18:26 -07:00
fs.h
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io-wq.c io_uring/io-wq: drop outdated comment 2023-04-03 07:16:15 -06:00
io-wq.h
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io_uring.c io_uring: remove extra tw trylocks 2023-04-03 07:16:15 -06:00
io_uring.h io_uring: mark task TASK_RUNNING before handling resume/task work 2023-02-06 08:23:21 -07:00
kbuf.c io_uring/kbuf: disallow mapping a badly aligned provided ring buffer 2023-04-03 07:16:14 -06:00
kbuf.h io_uring: add support for user mapped provided buffer ring 2023-04-03 07:14:21 -06:00
msg_ring.c io_uring/msg_ring: let target know allocated index 2023-03-16 07:16:56 -06:00
msg_ring.h io_uring: get rid of double locking 2022-12-07 06:47:13 -07:00
net.c io_uring/net: avoid sending -ECONNABORTED on repeated connection requests 2023-03-20 20:44:45 -06:00
net.h io_uring: Add KASAN support for alloc_caches 2023-04-03 07:16:14 -06:00
nop.c
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nop.h
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notif.c io_uring: refactor req allocation 2023-01-29 15:17:41 -07:00
notif.h io_uring: move zc reporting from the hot path 2022-11-21 07:38:31 -07:00
opdef.c io_uring,audit: don't log IORING_OP_MADVISE 2023-02-10 16:00:30 -07:00
opdef.h io_uring: Split io_issue_def struct 2023-01-29 15:17:41 -07:00
openclose.c io_uring: always go async for unsupported open flags 2023-01-29 15:18:26 -07:00
openclose.h
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poll.c io_uring/poll: clear single/double poll flags on poll arming 2023-03-28 07:09:01 -06:00
poll.h io_uring/poll: allow some retries for poll triggering spuriously 2023-02-25 20:10:13 -07:00
refs.h
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rsrc.c io_uring/rsrc: fix null-ptr-deref in io_file_bitmap_get() 2023-03-22 11:04:55 -06:00
rsrc.h io_uring/rsrc: fix rogue rsrc node grabbing 2023-03-29 09:23:46 -06:00
rw.c for-6.3/iter-ubuf-2023-02-16 2023-02-20 14:03:57 -08:00
rw.h io_uring/rw: don't lose partial IO result on fail 2022-09-21 13:15:02 -06:00
slist.h io_uring: silence variable ‘prev’ set but not used warning 2023-03-09 10:10:58 -07:00
splice.c io_uring: for requests that require async, force it 2023-01-29 15:18:26 -07:00
splice.h
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sqpoll.c io_uring/sqpoll: Do not set PF_NO_SETAFFINITY on sqpoll threads 2023-03-15 06:50:59 -06:00
sqpoll.h io_uring: make io_sqpoll_wait_sq return void 2023-01-29 15:17:40 -07:00
statx.c io_uring: for requests that require async, force it 2023-01-29 15:18:26 -07:00
statx.h
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sync.c io_uring: for requests that require async, force it 2023-01-29 15:18:26 -07:00
sync.h
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tctx.c io_uring: rename 'in_idle' to 'in_cancel' 2023-02-22 09:57:23 -07:00
tctx.h io_uring: simplify __io_uring_add_tctx_node 2022-10-07 12:25:30 -06:00
timeout.c io_uring: ease timeout flush locking requirements 2022-12-14 08:53:35 -07:00
timeout.h io_uring: remove unused return from io_disarm_next 2022-09-21 13:15:01 -06:00
uring_cmd.c block-6.3-2023-03-24 2023-03-24 14:10:39 -07:00
uring_cmd.h
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xattr.c io_uring: for requests that require async, force it 2023-01-29 15:18:26 -07:00
xattr.h
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