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author | Pavel Begunkov <asml.silence@gmail.com> | 2023-01-09 17:46:13 +0300 |
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committer | Jens Axboe <axboe@kernel.dk> | 2023-01-30 01:17:40 +0300 |
commit | c3f4d39ee4bc06f975ff45012398342ff276eb69 (patch) | |
tree | c9b87d65bcfa0cfb1161e63468cbe3de2b125c49 /io_uring/nop.h | |
parent | d80c0f00d04766972c95e72b7535a842d6f4680d (diff) | |
download | linux-c3f4d39ee4bc06f975ff45012398342ff276eb69.tar.xz |
io_uring: optimise deferred tw execution
We needed fake nodes in __io_run_local_work() and to avoid unecessary wake
ups while the task already running task_works, but we don't need them
anymore since wake ups are protected by cq_waiting, which is always
cleared by the time we're executing deferred task_work items.
Note that because of loose sync around cq_waiting clearing
io_req_local_work_add() may wake the task more than once, but that's
fine and should be rare to not hurt perf.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8839534891f0a2f1076e78554a31ea7e099f7de5.1673274244.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/nop.h')
0 files changed, 0 insertions, 0 deletions