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Date: Thu, 28 Nov 2013 10:38:58 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Yinghai Lu <yinghai@kernel.org>
Cc: David Rientjes <rientjes@google.com>, Ingo Molnar <mingo@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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Subject: Re: [tip:sched/urgent] sched: Check sched_domain before computing
 group power
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On Wed, Nov 27, 2013 at 11:07:04PM -0800, Yinghai Lu wrote:
> On Wed, Nov 27, 2013 at 7:02 PM, David Rientjes <rientjes@google.com> wrote:
> > On Thu, 21 Nov 2013, Yinghai Lu wrote:
> >
> >> original one in linus's tree:
> >>
> >> [    8.952728] NMI watchdog: enabled on all CPUs, permanently consumes
> >> one hw-PMU counter.
> >> [    8.965697] BUG: unable to handle kernel NULL pointer dereference
> >> at 0000000000000010
> >> [    8.969495] IP: [<ffffffff810d7b53>] update_group_power+0x1d3/0x250
> >
> > This should have been fixed by Srikar's patch, no?
> 
> maybe not related, now in another system, linus's tree + Srikar's patch.

And this another such -EX system? And from what I can tell its during
boot, right?

Totally weird.