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

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Message-ID: <20130305095821.GC4881@pd.tnic>
Date:	Tue, 5 Mar 2013 10:58:21 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Jiri Slaby <jslaby@...e.cz>, "Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>,
	e1000-devel@...ts.sourceforge.net,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>
Subject: Re: Uhhuh. NMI received for unknown reason 2c on CPU 0.

On Tue, Mar 05, 2013 at 10:42:17AM +0100, Jiri Slaby wrote:
> On 03/05/2013 01:16 AM, Bjorn Helgaas wrote:
> > [+cc e1000-devel, Jeff, Bruce]
> > 
> > On Mon, Mar 4, 2013 at 2:50 PM, Borislav Petkov <bp@...en8.de> wrote:
> >> On Fri, Feb 15, 2013 at 10:16:41AM +0100, Borislav Petkov wrote:
> >>> So it looks Bjorn has taken most of them and the e1000e one will go
> >>> through the e1000e maintainers. I'll test after the merge window is
> >>> done.
> >>
> >> Issue still persists on 3.9-rc1 :-( :
> >>
> >> Mar  4 21:47:34 nazgul vmunix: [ 3223.412541] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
> >> Mar  4 21:47:34 nazgul vmunix: [ 3223.412554] e1000e 0000:00:19.0 eth0: 10/100 speed: disabling TSO
> >> Mar  4 21:47:35 nazgul vmunix: [ 3224.034158] Uhhuh. NMI received for unknown reason 2c on CPU 0.
> >> Mar  4 21:47:35 nazgul vmunix: [ 3224.034166] Do you have a strange power saving mode enabled?
> >> Mar  4 21:47:35 nazgul vmunix: [ 3224.034168] Dazed and confused, but trying to continue
> > 
> > The e1000e changes didn't get merged, did they?  I don't see the
> > following changes mentioned at https://lkml.org/lkml/2013/2/4/185 in
> > 3.9-rc1:
> > 
> >       e1000e: fix pci-device enable-counter balance
> >       e1000e: fix runtime power management transitions
> >       e1000e: fix accessing to suspended device
> 
> You're right. They are not even in -next :(.

Oh, and there's another issue with this driver I reported yesterday:
http://marc.info/?l=linux-kernel&m=136243374114892&w=2:

"Trying to free already-free IRQ 20"

which happens during suspend so it seems also related.

Rafael, what's the state of those patches here:
https://lkml.org/lkml/2013/2/4/185, are they ready to be tested or you
still have issues with them?

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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