From: Pavel Begunkov <asml.silence@gmail.com>
To: Jens Axboe <axboe@kernel.dk>, io-uring@vger.kernel.org
Subject: [PATCH 04/13] io_uring: simplify waking sqo_sq_wait
Date: Sun, 16 May 2021 22:58:03 +0100 [thread overview]
Message-ID: <e2e91751e87b1a39f8d63ef884aaff578123f61e.1621201931.git.asml.silence@gmail.com> (raw)
In-Reply-To: <cover.1621201931.git.asml.silence@gmail.com>
Going through submission in __io_sq_thread() and still having a full SQ
is rather unexpected, so remove a check for SQ fullness and just wake up
whoever wait on sqo_sq_wait. Also skip if it doesn't do submission in
the first place, likely may to happen for SQPOLL sharing and/or IOPOLL.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 152873b88efe..192ce31d310c 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6796,10 +6796,10 @@ static int __io_sq_thread(struct io_ring_ctx *ctx, bool cap_entries)
!(ctx->flags & IORING_SETUP_R_DISABLED))
ret = io_submit_sqes(ctx, to_submit);
mutex_unlock(&ctx->uring_lock);
- }
- if (!io_sqring_full(ctx) && wq_has_sleeper(&ctx->sqo_sq_wait))
- wake_up(&ctx->sqo_sq_wait);
+ if (to_submit && wq_has_sleeper(&ctx->sqo_sq_wait))
+ wake_up(&ctx->sqo_sq_wait);
+ }
return ret;
}
--
2.31.1
next prev parent reply other threads:[~2021-05-16 21:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-16 21:57 [PATCH for-next 00/13] 5.14 cleanups Pavel Begunkov
2021-05-16 21:58 ` [PATCH 01/13] io_uring: improve sqpoll event/state handling Pavel Begunkov
2021-05-16 21:58 ` [PATCH 02/13] io_uring: improve sq_thread waiting check Pavel Begunkov
2021-05-16 21:58 ` [PATCH 03/13] io_uring: remove unused park_task_work Pavel Begunkov
2021-05-16 21:58 ` Pavel Begunkov [this message]
2021-05-16 21:58 ` [PATCH 05/13] io_uring: get rid of files in exit cancel Pavel Begunkov
2021-05-16 21:58 ` [PATCH 06/13] io_uring: make fail flag not link specific Pavel Begunkov
2021-05-16 21:58 ` [PATCH 07/13] io_uring: shuffle rarely used ctx fields Pavel Begunkov
2021-05-16 21:58 ` [PATCH 08/13] io_uring: better locality for rsrc fields Pavel Begunkov
2021-05-16 21:58 ` [PATCH 09/13] io_uring: remove dependency on ring->sq/cq_entries Pavel Begunkov
2021-05-16 21:58 ` [PATCH 10/13] io_uring: deduce cq_mask from cq_entries Pavel Begunkov
2021-05-16 21:58 ` [PATCH 11/13] io_uring: kill cached_cq_overflow Pavel Begunkov
2021-05-16 21:58 ` [PATCH 12/13] io_uring: rename io_get_cqring Pavel Begunkov
2021-05-16 21:58 ` [PATCH 13/13] io_uring: don't bounce submit_state cachelines Pavel Begunkov
2021-05-24 17:41 ` [PATCH for-next 00/13] 5.14 cleanups Jens Axboe
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