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Date:   Wed, 16 Dec 2020 14:01:14 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: TREE01 rcutorture writer stalls?

On Tue, Dec 15, 2020 at 09:04:07PM -0800, Paul E. McKenney wrote:
> Hello, Frederic,
> 
> Are you seeing rcutorture writer stalls?  Please see attached for an
> example from testing, search for "Call Trace".  I am running an overnight
> test, which should get me some idea of frequency.  My thought is to run
> on the same version, but without the rcutorture.nocbs_nthreads=0 and
> rcutorture.nocbs_toggle=1000 kernel boot parameters.
> 
> This sort of error can occur when grace periods are progressing, but
> callback processing is not.  Things do seem to recover.
> 
> Other thoughts?

Ok I'm trying to reproduce that.

Thanks.

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