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Date: Thu, 14 Mar 2013 15:17:19 -0700
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Subject: Re: [GIT PULL] perf fixes
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Stephane Eranian <eranian@google.com>
Cc: Ingo Molnar <mingo@kernel.org>,
        Arnaldo Carvalho de Melo <acme@infradead.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Thu, Mar 14, 2013 at 3:09 PM, Stephane Eranian <eranian@google.com> wrote:
>
> Could be related to suspend/resume. But were you running perf across
> that resume/suspend cycle?

No.

In most cases I was running a perf record before and after (but not
*while* suspending)

In at least one other crash, I didn't run perf before at all, so the
first time I used perf was after the resume.

So in no cases did I actually have any perf stuff active over the
suspend itself.

> Let's see if we can reproduce the problem on the same ChromeBook you
> have. Don't have one myself.

I don't imagine it should be about chromebook per se, because afaik
all of pmu suspend/resume is done by the kernel, no firmware involved.

So I'd assume it should happen with any IvyBridge.

            Linus