linux-kernel - Re: NULL pointer dereference in pick_next_task

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Message-ID: <20191107194232.GA58063@google.com>
Date:   Thu, 7 Nov 2019 19:42:32 +0000
From:   Quentin Perret <qperret@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Kirill Tkhai <ktkhai@...tuozzo.com>, linux-kernel@...r.kernel.org,
        aaron.lwe@...il.com, valentin.schneider@....com, mingo@...nel.org,
        pauld@...hat.com, jdesfossez@...italocean.com,
        naravamudan@...italocean.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, juri.lelli@...hat.com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        kernel-team@...roid.com, john.stultz@...aro.org
Subject: Re: NULL pointer dereference in pick_next_task_fair

On Thursday 07 Nov 2019 at 20:31:34 (+0100), Peter Zijlstra wrote:
> Thing is, if we revert (and we might have to), we'll have to revert more
> than just the one patch due to that other (__pick_migrate_task) borkage
> that got reported today.

Fair enough, let's try an avoid reverting the world if possible ...
I'll give a go to your patch tomorrow first thing.

Cheers,
Quentin