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Message-ID: <589c684a04b4e91e99b22409c614baea35dc93ad.camel@redhat.com>
Subject: Re: [PATCH v4 11/19] sched/core: Make migrate disable and CPU
 hotplug cooperative
From:   Qian Cai <qcai@redhat.com>
To:     Valentin Schneider <valentin.schneider@arm.com>
Cc:     Peter Zijlstra <peterz@infradead.org>, tglx@linutronix.de,
        mingo@kernel.org, linux-kernel@vger.kernel.org,
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        juri.lelli@redhat.com, vincent.guittot@linaro.org,
        dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com,
        mgorman@suse.de, bristot@redhat.com, vincent.donnefort@arm.com,
        tj@kernel.org, ouwen210@hotmail.com
Date:   Tue, 08 Dec 2020 08:46:23 -0500
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On Mon, 2020-12-07 at 19:27 +0000, Valentin Schneider wrote:
> Ok, can reproduce this on a TX2 on next-20201207. I didn't use your config,
> I oldconfig'd my distro config and only modified it to CONFIG_PREEMPT_NONE.
> Interestingly the BUG happens on CPU127 here too...

I think that number is totally random. For example, on this x86, it could happen
for CPU8 or CPU111.