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io_uring: optimise success case of __io_queue_sqe 

Move the case of successfully issued request by doing that check first.
It's not much of a difference, just generates slightly better code for
me.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-03-19 17:22:34 +00:00 committed by Jens Axboe
parent de968c182b
commit 1840038e11
1 changed files with 9 additions and 9 deletions
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18
fs/io_uring.c
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@ -6330,15 +6330,7 @@ static void __io_queue_sqe(struct io_kiocb *req)
* We async punt it if the file wasn't marked NOWAIT, or if the file
* doesn't support non-blocking read/write attempts
*/
if (ret == -EAGAIN && !(req->flags & REQ_F_NOWAIT)) {
if (!io_arm_poll_handler(req)) {
/*
* Queued up for async execution, worker will release
* submit reference when the iocb is actually submitted.
*/
io_queue_async_work(req);
}
} else if (likely(!ret)) {
if (likely(!ret)) {
/* drop submission reference */
if (req->flags & REQ_F_COMPLETE_INLINE) {
struct io_ring_ctx *ctx = req->ctx;
@ -6350,6 +6342,14 @@ static void __io_queue_sqe(struct io_kiocb *req)
} else {
io_put_req(req);
}
} else if (ret == -EAGAIN && !(req->flags & REQ_F_NOWAIT)) {
if (!io_arm_poll_handler(req)) {
/*
* Queued up for async execution, worker will release
* submit reference when the iocb is actually submitted.
*/
io_queue_async_work(req);
}
} else {
io_req_complete_failed(req, ret);
}