linux-kernel - Re: [PATCH] sched/rt: Plug rt_mutex_setprio() vs push_rt

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Message-ID: <878rv5489v.mognet@arm.com>
Date:   Mon, 24 Jan 2022 12:39:56 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     John Keeping <john@...anate.com>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: Re: [PATCH] sched/rt: Plug rt_mutex_setprio() vs push_rt_task() race

On 21/01/22 19:47, John Keeping wrote:
> On Thu, 20 Jan 2022 19:47:01 +0000
> Valentin Schneider <valentin.schneider@....com> wrote:
>
>> On 20/01/22 19:40, Valentin Schneider wrote:
>> > Link: http://lore.kernel.org/r/Yb3vXx3DcqVOi+EA@donbot
>> > Fixes: a7c81556ec4d ("sched: Fix migrate_disable() vs rt/dl balancing")
>> > Reported-by: John Keeping <john@...anate.com>
>> > Signed-off-by: Valentin Schneider <valentin.schneider@....com>  
>> 
>> @John: it's slightly different than the few things we got you to try out,
>> so I didn't keep your tested-by, sorry!
>
> I ran a test with this version as well and as expected this does indeed
> fix the issue, so this is also:
>
> Tested-by: John Keeping <john@...anate.com>

Thanks for testing this again!