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Subject: Re: [tip:locking/core] sched/core: Fix an SMP ordering race in
 try_to_wake_up() vs. schedule()
From: Mike Galbraith <efault@gmx.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: stable <stable@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Oleg Nesterov <oleg@redhat.com>,
        linux-tip-commits <linux-tip-commits@vger.kernel.org>
Date: Fri, 07 Oct 2016 11:33:32 +0200
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On Fri, 2016-10-07 at 10:29 +0200, Peter Zijlstra wrote:
> On Fri, Oct 07, 2016 at 03:36:55AM +0200, Mike Galbraith wrote:
> > Seems this may be one of those not so theoretical races.  A humongous
> > ppc64 box actually managed to run a task on two cores.. briefly.
> 
> Cute :-) Why was you running a year old kernel on that box anyway? ;-)

It was a 3.0 kernel.. and nearly virgin, a tad less than 22k patches :)

	-Mike