io_uring: remove wait loop spurious wakeups

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Any changes interesting to tasks waiting in io_cqring_wait() are
commited with io_cqring_ev_posted(). However, io_ring_drop_ctx_refs()
also tries to do that but with no reason, that means spurious wakeups
every io_free_req() and io_uring_enter().

Just use percpu_ref_put() instead.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2019-10-08 02:18:42 +03:00 • committed by Jens Axboe

parent b84477d3eb

commit 6805b32ec2

1 changed files with 4 additions and 12 deletions

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fs/io_uring.c

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