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From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Subject: [PATCH 5/8] io_uring: don't fail iopoll requeue without ->mm
Date: Tue, 30 Jun 2020 15:20:40 +0300	[thread overview]
Message-ID: <077f8e268ecf1af22434cb2d23a5892f3d509530.1593519186.git.asml.silence@gmail.com> (raw)
In-Reply-To: <[email protected]>

Actually, io_iopoll_queue() may have NULL ->mm, that's if SQ thread
didn't grabbed mm before doing iopoll. Don't fail reqs there, as after
recent changes it won't be punted directly but rather through task_work.

Signed-off-by: Pavel Begunkov <[email protected]>
---
 fs/io_uring.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index c7986c27272e..589cc157e29c 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1881,9 +1881,7 @@ static void io_iopoll_queue(struct list_head *again)
 	do {
 		req = list_first_entry(again, struct io_kiocb, list);
 		list_del(&req->list);
-
-		/* should have ->mm unless io_uring is dying, kill reqs then */
-		if (unlikely(!current->mm) || !io_rw_reissue(req, -EAGAIN))
+		if (!io_rw_reissue(req, -EAGAIN))
 			io_complete_rw_common(&req->rw.kiocb, -EAGAIN, NULL);
 	} while (!list_empty(again));
 }
-- 
2.24.0


  parent reply	other threads:[~2020-06-30 12:22 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30 12:20 [PATCH 0/8] iopoll and task_work fixes Pavel Begunkov
2020-06-30 12:20 ` [PATCH 1/8] io_uring: fix io_fail_links() locking Pavel Begunkov
2020-06-30 14:38   ` Jens Axboe
2020-06-30 14:45     ` Pavel Begunkov
2020-06-30 12:20 ` [PATCH 2/8] io_uring: fix commit_cqring() locking in iopoll Pavel Begunkov
2020-06-30 14:04   ` Jens Axboe
2020-06-30 14:36     ` Pavel Begunkov
2020-06-30 14:46       ` Jens Axboe
2020-06-30 15:00         ` Pavel Begunkov
2020-06-30 15:33           ` Jens Axboe
2020-06-30 12:20 ` [PATCH 3/8] io_uring: fix ignoring eventfd " Pavel Begunkov
2020-06-30 12:20 ` [PATCH 4/8] io_uring: fix missing ->mm on exit Pavel Begunkov
2020-06-30 12:20 ` Pavel Begunkov [this message]
2020-06-30 12:20 ` [PATCH 6/8] io_uring: fix NULL mm in io_poll_task_func() Pavel Begunkov
2020-06-30 12:20 ` [PATCH 7/8] io_uring: simplify io_async_task_func() Pavel Begunkov
2020-06-30 12:20 ` [PATCH 8/8] io_uring: optimise io_req_find_next() fast check Pavel Begunkov
2020-06-30 12:39 ` [PATCH 0/8] iopoll and task_work fixes Pavel Begunkov

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