linux-kernel - Re: [PATCH v5] io_uring: don't wait when under-submitting

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Message-ID: <7b684479-d0f9-4e74-b947-5ceba577734a@kernel.dk>
Date:   Wed, 18 Dec 2019 09:56:51 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5] io_uring: don't wait when under-submitting

On 12/18/19 9:53 AM, Pavel Begunkov wrote:
> There is no reliable way to submit and wait in a single syscall, as
> io_submit_sqes() may under-consume sqes (in case of an early error).
> Then it will wait for not-yet-submitted requests, deadlocking the user
> in most cases.
> 
> Don't wait/poll if can't submit all sqes

This looks great, thanks, applied.

-- 
Jens Axboe