public inbox for [email protected]
 help / color / mirror / Atom feed
* [PATCH] io_uring: wakeup threads waiting for EPOLLOUT events
@ 2020-01-16 13:49 Stefano Garzarella
  2020-01-16 15:29 ` Jens Axboe
  0 siblings, 1 reply; 10+ messages in thread
From: Stefano Garzarella @ 2020-01-16 13:49 UTC (permalink / raw)
  To: Jens Axboe; +Cc: Alexander Viro, io-uring, linux-kernel, linux-fsdevel

io_uring_poll() sets EPOLLOUT flag if there is space in the
SQ ring, then we should wakeup threads waiting for EPOLLOUT
events when we expose the new SQ head to the userspace.

Signed-off-by: Stefano Garzarella <[email protected]>
---

Do you think is better to change the name of 'cq_wait' and 'cq_fasync'?

Thanks,
Stefano
---
 fs/io_uring.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 38b54051facd..5c6ff5f9e741 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3687,6 +3687,11 @@ static void io_commit_sqring(struct io_ring_ctx *ctx)
 		 * write new data to them.
 		 */
 		smp_store_release(&rings->sq.head, ctx->cached_sq_head);
+
+		if (wq_has_sleeper(&ctx->cq_wait)) {
+			wake_up_interruptible(&ctx->cq_wait);
+			kill_fasync(&ctx->cq_fasync, SIGIO, POLL_OUT);
+		}
 	}
 }
 
-- 
2.24.1


^ permalink raw reply related	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2020-01-24  1:28 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-01-16 13:49 [PATCH] io_uring: wakeup threads waiting for EPOLLOUT events Stefano Garzarella
2020-01-16 15:29 ` Jens Axboe
2020-01-16 15:55   ` Stefano Garzarella
2020-01-16 16:00     ` Jens Axboe
2020-01-16 16:26       ` Stefano Garzarella
2020-01-16 16:30         ` Jens Axboe
2020-01-16 17:03           ` Stefano Garzarella
2020-01-23 19:13             ` Jens Axboe
2020-01-23 21:45               ` Stefano Garzarella
2020-01-24  1:28                 ` Jens Axboe

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox