io_uring: optimise io_uring_enter()

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Add unlikely annotations, because my compiler pretty much mispredicts
every first check, and apart jumping around in the fast path, it also
generates extra instructions, like in advance setting ret value.

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

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Pavel Begunkov 2021-03-19 17:22:30 +00:00 • committed by Jens Axboe

parent 493f3b158a

commit 33f993da98

1 changed files with 7 additions and 7 deletions

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fs/io_uring.c

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