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Subject: Re: WARNING: CPU: 0 PID: 12 at kernel/sched/fair.c:3306
 update_blocked_averages+0x941/0x9a0
To:     Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Juri Lelli <juri.lelli@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
        Daniel Bristot de Oliveira <bristot@redhat.com>
Cc:     linux-kernel@vger.kernel.org, Ammar Faizi <ammarfaizi2@gmail.com>
References: <b18744a7-d300-59a8-a6d7-55ba88471252@gnuweeb.org>
 <7473b5ba-72bf-7836-44a6-42851081a277@arm.com>
From:   Ammar Faizi <ammarfaizi2@gnuweeb.org>
Message-ID: <9d1680de-39e5-609c-7410-7baabfb079e5@gnuweeb.org>
Date:   Mon, 2 Aug 2021 19:52:13 +0700
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On 8/2/21 3:42 PM, Dietmar Eggemann wrote:
> So you're running with:
>
> 9e077b52d86a - sched/pelt: Check that *_avg are null when *_sum are
> (2021-06-17 Vincent Guittot)
>
> but not with:
>
> ceb6ba45dc80 - sched/fair: Sync load_sum with load_avg after dequeue
> (2021-07-02 Vincent Guittot)
>
> The SCHED_WARN_ON you're hitting is harmless and just tells you that the
> PELT load_avg and load_sum part of one of your cfs_rq's is not aligned.
> Has to be load (and not util or runnable) since load is the only one
> still not fixed in f55966571d5e.
>
> This should go away once you applied ceb6ba45dc80.

Alright, I have just moved to 5.14-rc4 and doesn't seem to have this
issue anymore.

Thanks for the response, Dietmar.

  Ammar