linux-kernel - Re: Question about sched

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Message-Id: <20190513122043.GJ3923@linux.ibm.com>
Date:   Mon, 13 May 2019 05:20:43 -0700
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     Andrea Parri <andrea.parri@...rulasolutions.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Morten Rasmussen <morten.rasmussen@....com>, joelaf@...gle.com,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: Question about sched_setaffinity()

On Sun, May 12, 2019 at 03:05:39AM +0200, Andrea Parri wrote:
> > > > 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?
> 
> Please feel free to do so.  But it may be worth to squash "the commits"
> (and adjust the changelogs accordingly).  And you might want to remove
> some of those debug checks/prints?

Revert/remove a number of the commits, but yes.  ;-)

And remove the extra loop, but leave the single WARN_ON() complaining
about being on the wrong CPU.

							Thanx, Paul