From: Jens Axboe <[email protected]>
To: Hao Xu <[email protected]>
Cc: [email protected], Pavel Begunkov <[email protected]>,
Joseph Qi <[email protected]>
Subject: Re: [PATCH] io_uring: check sqring and iopoll_list before shedule
Date: Fri, 23 Apr 2021 08:27:17 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 4/21/21 9:19 AM, Hao Xu wrote:
> do this to avoid race below:
>
> userspace kernel
>
> | check sqring and iopoll_list
> submit sqe |
> check IORING_SQ_NEED_WAKEUP |
> (which is not set) | |
> | set IORING_SQ_NEED_WAKEUP
> wait cqe | schedule(never wakeup again)
Applied, thanks.
--
Jens Axboe
prev parent reply other threads:[~2021-04-23 14:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-21 15:19 [PATCH] io_uring: check sqring and iopoll_list before shedule Hao Xu
2021-04-21 15:46 ` Hao Xu
2021-04-23 14:11 ` Pavel Begunkov
2021-04-23 14:27 ` Jens Axboe [this message]
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