linux-kernel - Re: Uhhuh. NMI received for unknown reason 2c on CPU 0.

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Message-ID: <5109A8F1.9040707@suse.cz>
Date:	Thu, 31 Jan 2013 00:12:49 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Borislav Petkov <bp@...en8.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Subject: Re: Uhhuh. NMI received for unknown reason 2c on CPU 0.

On 01/30/2013 11:45 PM, Rafael J. Wysocki wrote:
> On Wednesday, January 30, 2013 11:17:06 PM Jiri Slaby wrote:
>> On 01/30/2013 10:39 PM, Rafael J. Wysocki wrote:
>>>> What is cool is that I have steps to reproduce:
>>>> 1) boot
>>>> 2) run the attached script (turn on all possible power savings -- in
>>>> fact everything what powertop suggests)
>>>> 3) suspend to _disk_ (mem is not enough, BIOS apparently has to
>>>> interfere here)
>>>
>>> No, I don't think it's the BIOS.  Most likely the boot kernel.
>>
>> Or that...
>>
>>>> 4) resume from disk
>>>> 5) boom
>>>>
>>>> I tried to remove also wireless drivers, no change.
>>>
>>> Is the resume boot kernel the same as the one in the image?
>>
>> Yeah, the same ones: 3.7.5
> 
> Well, I guess that we leak some state from the boot kernel to the image kernel.
> I have no idea what it is, but I suspect something arch-specific.
> 
> I wonder what the affected systems have in common apart from e1000e?

Everything as I have thinkpad x230 too :). Is there any other report
than Borislav's?

I think I will start with commenting parts of `power' script to see
exactly which of the power savings cause this.

-- 
js
suse labs
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