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From: Vincent Palatin <vpalatin@chromium.org>
Date: Fri, 30 Nov 2012 13:45:42 -0800
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Subject: Re: [PATCH] x86, fpu: avoid FPU lazy restore after suspend
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Ingo Molnar <mingo@redhat.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        "the arch/x86 maintainers" <x86@kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Jarkko Sakkinen <jarkko.sakkinen@intel.com>,
        Duncan Laurie <dlaurie@chromium.org>,
        Olof Johansson <olofj@chromium.org>
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On Fri, Nov 30, 2012 at 11:55 AM, H. Peter Anvin <hpa@zytor.com> wrote:
>
> On 11/30/2012 11:54 AM, Vincent Palatin wrote:
> >>
> > I have done a patch v2 according to your suggestions.
> > I will run the testing on it now.
> > I probably need at least 2 to 3 hours to validate it.
> >
>
> That would be super.  Let me know and I'll queue it up and send a pull
> request with this and a few more urgent things to Linus.


I have done 1000+ cycles so far with patch v3 (on 4-core Ivybridge and
no eagerfpu),
and did not hit my issue.
I let the testing going on,
but wrt the issue after suspend, this fixes it with very high probability
(ie I have never done that many cycles without hitting the issue).

-- 
Vincent