linux-kernel - Re: 2.6.38-rc2: Uhhuh. NMI received for unknown reason 2d on CPU 0.

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Date:	Thu, 17 Feb 2011 18:40:55 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
Cc:	Ryan Underwood <ryan.underwood@...ghtsafety.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.38-rc2: Uhhuh. NMI received for unknown reason 2d on CPU 0.

On Thu, Feb 17, 2011 at 10:59:43AM +0300, Cyrill Gorcunov wrote:
> On Thu, Feb 17, 2011 at 3:17 AM, Ryan Underwood
> <ryan.underwood@...ghtsafety.com> wrote:
> > Preeti Khurana <Preeti.Khurana <at> guavus.com> writes:
> >
> >>
> >> I am getting the similar issue as reported
> >> in https://lkml.org/lkml/2011/2/10/187
> >>
> >> Can someone tell me if the same issue  because I am getting the
> >> problem on Intel Xeon..
> >>
> >
> > I am seeing exactly the same problem (on 2.6.35 as Preeti reported originally)
> > on some Xeon servers but only with recently shipped BIOS revisions. The OS is
> > CentOS 5.5.
> >
> ...
> > I have not tried the following patches yet which seem to both be for spurious
> > NMI messages, not accompanied by system lockups:
> >
> > https://lkml.org/lkml/2011/2/16/106
> > https://lkml.org/lkml/2011/2/1/286
> >
> > Both nmi_watchdog=0 and pcie_aspm=off options do not solve the problem.
> >
> > I am not subscribed so please Cc me.

Given 2.6.35, has anyone tried applying the following patch?

	https://patchwork.kernel.org/patch/23985/

It turned out to resolve an otherwise mysterious RCU CPU stall warning
for someone running 2.6.36, IIRC.

							Thanx, Paul
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