linux-kernel - Re: [PATCH] block: Fix sys_ioprio_set(.which=IOPRIO_WHO

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Message-ID: <e8579a4e-2456-a89b-b750-892d265ba053@kernel.dk>
Date:   Thu, 8 Apr 2021 13:44:23 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Peter Zijlstra <peterz@...radead.org>,
        Oleg Nesterov <oleg@...hat.com>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: Fix sys_ioprio_set(.which=IOPRIO_WHO_PGRP) task
 iteration

On 4/8/21 3:46 AM, Peter Zijlstra wrote:
> 
> do_each_pid_thread() { } while_each_pid_thread() is a double loop and
> thus break doesn't work as expected. Also, it should be used under
> tasklist_lock because otherwise we can race against change_pid() for
> PGID/SID.

Applied, thanks.

-- 
Jens Axboe