linux-kernel - AW: warning in arch/x86/kernel/cpu/mtrr/generic.c:400 with2.6.29-rc3 on IBM x3400

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Message-ID: <B4ED8DE8E195E84A872496A085BC07822F1E@exchange01.corp.win-professional.com>
Date:	Tue, 10 Feb 2009 01:25:39 +0100
From:	"Morten P.D. Stevens" <mstevens@...-professional.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	<linux-kernel@...r.kernel.org>
Subject: AW: warning in arch/x86/kernel/cpu/mtrr/generic.c:400 with2.6.29-rc3 on IBM x3400

Hi,

> buggy BIOS most likely. Had the kernel not fixed up the MTRRs you'd have
> a very slow and unhappy system now.

the IBM support said the bios is okay and there is a issue with linux 2.6.28 and 2.6.29-rc3?
linux 2.6.26 (default debian kernel) works fine.

-

Morten

-----Ursprüngliche Nachricht-----
Von: Ingo Molnar [mailto:mingo@...e.hu] 
Gesendet: Dienstag, 10. Februar 2009 00:45
An: Morten P.D. Stevens; Yinghai Lu; Thomas Gleixner; H. Peter Anvin; Arjan van de Ven
Cc: linux-kernel@...r.kernel.org
Betreff: Re: warning in arch/x86/kernel/cpu/mtrr/generic.c:400 with2.6.29-rc3 on IBM x3400

* Morten P.D. Stevens <mstevens@...-professional.com> wrote:

> Hi,
> 
> Update:
> 
> the same issue with a linux 2.6.28.4 kernel.
> 
> [    0.000000] ------------[ cut here ]------------
> [    0.000000] WARNING: at arch/x86/kernel/cpu/mtrr/generic.c:404 generic_get_mtrr+0xdf/0x119()
> [    0.000000] mtrr: your BIOS has set up an incorrect mask, fixing it up.

buggy BIOS most likely. Had the kernel not fixed up the MTRRs you'd have
a very slow and unhappy system now.

	Ingo
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