From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 22 Mar 2021 01:58:25 +0000 (+0000)
Subject: io_uring: don't do extra EXITING cancellations
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=682076801a2f46867743d9520d228e3c7eca751f;p=linux.git

io_uring: don't do extra EXITING cancellations

io_match_task() matches all requests with PF_EXITING task, even though
those may be valid requests. It was necessary for SQPOLL cancellation,
but now it kills all requests before exiting via
io_uring_cancel_sqpoll(), so it's not needed.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index a152c0fd24cc1..b33cc2926ac61 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1079,12 +1079,8 @@ static bool io_match_task(struct io_kiocb *head,
 {
 	struct io_kiocb *req;
 
-	if (task && head->task != task) {
-		/* in terms of cancelation, always match if req task is dead */
-		if (head->task->flags & PF_EXITING)
-			return true;
+	if (task && head->task != task)
 		return false;
-	}
 	if (!files)
 		return true;