From d97ec6239ad8684e4d31b12b39cefca6782c09a3 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Wed, 8 Sep 2021 16:40:53 +0100
Subject: [PATCH] io_uring: kill extra wake_up_process in tw add
Git-commit: d97ec6239ad8684e4d31b12b39cefca6782c09a3
Patch-mainline: v5.16-rc1
References: bsc#1205205
TWA_SIGNAL already wakes the thread, no need in wake_up_process() after
it.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/7e90cf643f633e857443e0c9e72471b221735c50.1631115443.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
fs/io_uring.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index c4ec3672da77..ead85f4d3427 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2197,8 +2197,9 @@ static void io_req_task_work_add(struct io_kiocb *req)
* will do the job.
*/
notify = (req->ctx->flags & IORING_SETUP_SQPOLL) ? TWA_NONE : TWA_SIGNAL;
- if (!task_work_add(tsk, &tctx->task_work, notify)) {
- wake_up_process(tsk);
+ if (likely(!task_work_add(tsk, &tctx->task_work, notify))) {
+ if (notify == TWA_NONE)
+ wake_up_process(tsk);
return;
}
--
2.35.3