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Date:   Sat, 11 May 2019 17:39:15 -0700
From:   "Paul E. McKenney" <paulmck@linux.ibm.com>
To:     Andrea Parri <andrea.parri@amarulasolutions.com>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        Juri Lelli <juri.lelli@redhat.com>,
        Morten Rasmussen <morten.rasmussen@arm.com>, joelaf@google.com,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: Question about sched_setaffinity()
Reply-To: paulmck@linux.ibm.com
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On Sat, May 11, 2019 at 11:45:20PM +0200, Andrea Parri wrote:
> > > The below trace explain the issue. Some Paul person did it, see below.
> > > It's broken per construction :-)
> > 
> > *facepalm*  Hence the very strange ->cpus_allowed mask.  I really
> > should have figured that one out.
> > 
> > The fix is straightforward.  I just added "rcutorture.shuffle_interval=0"
> > to the TRIVIAL.boot file, which stops rcutorture from shuffling its
> > kthreads around.
> 
> I added the option to the file and I didn't reproduce the issue.

Thank you!  May I add your Tested-by?

							Thanx, Paul

> > Please accept my apologies for the hassle, and thank you for tracking
> > this down!!!
> 
> Peter (echoing Paul):  Thank you for pointing that shuffler out!
> 
>   Andrea
>