linux-kernel - Re: Question about sched

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Message-Id: <20190513121933.GI3923@linux.ibm.com>
Date:   Mon, 13 May 2019 05:19:33 -0700
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
        andrea.parri@...rulasolutions.com,
        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 Mon, May 13, 2019 at 10:10:52AM +0200, Peter Zijlstra wrote:
> On Fri, May 10, 2019 at 04:07:42PM -0700, Paul E. McKenney 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.
> 
> I guess it's called a torture framework for a reason ;-)

Fair enough.  And I doubt that this is the firs time that it has
tortured other people rather than torturing RCU.  ;-)

							Thanx, Paul