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| author | Pavel Begunkov <[email protected]> | 2023-01-05 10:49:15 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2023-01-05 15:04:47 +0000 |
| commit | 12521a5d5cb7ff0ad43eadfc9c135d86e1131fa8 (patch) | |
| tree | d9017ab2dc68c6ec6503969565c8acda18ac3dd0 /tools/perf/scripts/python/stat-cpi.py | |
| parent | io_uring: move 'poll_multi_queue' bool in io_ring_ctx (diff) | |
| download | kernel-12521a5d5cb7ff0ad43eadfc9c135d86e1131fa8.tar.gz kernel-12521a5d5cb7ff0ad43eadfc9c135d86e1131fa8.zip | |
io_uring: fix CQ waiting timeout handling
Jiffy to ktime CQ waiting conversion broke how we treat timeouts, in
particular we rearm it anew every time we get into
io_cqring_wait_schedule() without adjusting the timeout. Waiting for 2
CQEs and getting a task_work in the middle may double the timeout value,
or even worse in some cases task may wait indefinitely.
Cc: [email protected]
Fixes: 228339662b398 ("io_uring: don't convert to jiffies for waiting on timeouts")
Signed-off-by: Pavel Begunkov <[email protected]>
Link: https://lore.kernel.org/r/f7bffddd71b08f28a877d44d37ac953ddb01590d.1672915663.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/stat-cpi.py')
0 files changed, 0 insertions, 0 deletions