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From: Jens Axboe <[email protected]>
To: Pavel Begunkov <[email protected]>, [email protected]
Subject: Re: [PATCH 2/8] io_uring: fix commit_cqring() locking in iopoll
Date: Tue, 30 Jun 2020 08:04:27 -0600	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <75e5bc4f60d751239afa5d7bf2ec9b49308651ac.1593519186.git.asml.silence@gmail.com>

On 6/30/20 6:20 AM, Pavel Begunkov wrote:
> Don't call io_commit_cqring() without holding the completion spinlock
> in io_iopoll_complete(), it can race, e.g. with async request failing.

Can you be more specific?

-- 
Jens Axboe


  reply	other threads:[~2020-06-30 14:04 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 [this message]
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 ` [PATCH 5/8] io_uring: don't fail iopoll requeue without ->mm Pavel Begunkov
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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