linux-kernel - Re: lockdep splat in v5.11-rc1 involving console

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Date:   Wed, 06 Jan 2021 15:49:46 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     Peter Zijlstra <peterz@...radead.org>,
        "Paul E. McKenney" <paulmck@...nel.org>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        bristot@...hat.com, frederic@...nel.org
Subject: Re: lockdep splat in v5.11-rc1 involving console_sem and rq locks

On 06/01/21 16:44, Peter Zijlstra wrote:
> On Wed, Jan 06, 2021 at 06:46:21AM -0800, Paul E. McKenney wrote:
>> What would break if I made the code dump out a few entries in the
>> runqueue if the warning triggered?
>
> There was a patch around that did that, Valentin might remember where
> that was.

There is http://lore.kernel.org/r/jhjpn4bwznx.mognet@arm.com which is a
dumb inline of print_rq() / print_task().