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From:   Valentin Schneider <valentin.schneider@arm.com>
To:     Peter Zijlstra <peterz@infradead.org>,
        "Paul E. McKenney" <paulmck@kernel.org>
Cc:     tglx@linutronix.de, linux-kernel@vger.kernel.org,
        bristot@redhat.com, frederic@kernel.org
Subject: Re: lockdep splat in v5.11-rc1 involving console_sem and rq locks
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References: <20210105220115.GA27357@paulmck-ThinkPad-P72> <X/WITr5JuNvuMH+p@hirez.programming.kicks-ass.net> <20210106144621.GJ17086@paulmck-ThinkPad-P72> <X/Xa1fwplnZIOm+U@hirez.programming.kicks-ass.net>
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Date:   Wed, 06 Jan 2021 15:49:46 +0000
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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().