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

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Message-ID: <20210106175259.GM17086@paulmck-ThinkPad-P72>
Date:   Wed, 6 Jan 2021 09:52:59 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Valentin Schneider <valentin.schneider@....com>
Cc:     Peter Zijlstra <peterz@...radead.org>, 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 Wed, Jan 06, 2021 at 03:49:46PM +0000, Valentin Schneider wrote:
> 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().

Thank you both!  I will add this to the next round of testing.

							Thanx, Paul