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io_uring: refactor __io_cq_unlock_post_flush()

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Separate ->task_complete path in __io_cq_unlock_post_flush().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/baa9b8d822f024e4ee01c40209dbbe38d9c8c11d.1680782017.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2023-04-06 14:20:13 +01:00 committed by Jens Axboe
parent 8751d15426
commit c66ae3ec38
1 changed files with 12 additions and 10 deletions
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22
io_uring/io_uring.c
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@ -627,21 +627,23 @@ static inline void __io_cq_unlock_post(struct io_ring_ctx *ctx)
io_cqring_wake(ctx);
}
static inline void __io_cq_unlock_post_flush(struct io_ring_ctx *ctx)
static void __io_cq_unlock_post_flush(struct io_ring_ctx *ctx)
__releases(ctx->completion_lock)
{
io_commit_cqring(ctx);
__io_cq_unlock(ctx);
io_commit_cqring_flush(ctx);
/*
* As ->task_complete implies that the ring is single tasked, cq_wait
* may only be waited on by the current in io_cqring_wait(), but since
* it will re-check the wakeup conditions once we return we can safely
* skip waking it up.
*/
if (!(ctx->flags & IORING_SETUP_DEFER_TASKRUN))
if (ctx->task_complete) {
/*
* ->task_complete implies that only current might be waiting
* for CQEs, and obviously, we currently don't. No one is
* waiting, wakeups are futile, skip them.
*/
io_commit_cqring_flush(ctx);
} else {
__io_cq_unlock(ctx);
io_commit_cqring_flush(ctx);
io_cqring_wake(ctx);
}
}
void io_cq_unlock_post(struct io_ring_ctx *ctx)