io_uring: don't resched with empty task_list

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Entering tctx_task_work() with empty task_list is a strange scenario,
that can happen only on rare occasion during task exit, so let's not
check for task_list emptiness in advance and do it do-while style. The
code still correct for the empty case, just would do extra work about
which we don't care.

Do extra step and do the check before cond_resched(), so we don't
resched if have nothing to execute.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/c4173e288e69793d03c7d7ce826f9d28afba718a.1623949695.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2021-06-17 18:14:09 +01:00 • committed by Jens Axboe

parent c6538be9e4

commit 16f7207038

1 changed files with 3 additions and 1 deletions

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fs/io_uring.c

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