io_uring: switch !DRAIN fast path when possible

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->drain_used is one way, which is not optimal if users use DRAIN but
very rarely. However, we can just clear it in io_drain_req() when all
drained before requests are gone. Also rename the flag to reflect the
change and be more clear about it.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/7f37a240857546a94df6348507edddacab150460.1623772051.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2021-06-15 16:47:56 +01:00 • committed by Jens Axboe

parent 27f6b318de

commit 10c669040e

1 changed files with 8 additions and 6 deletions

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fs/io_uring.c

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