linux-kernel - Re: Memory issues with Opteron 6220

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Message-ID: <20120211135019.GE28098@elte.hu>
Date:	Sat, 11 Feb 2012 14:50:20 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	aowi@...ozymes.com,
	Andreas Herrmann <herrmann.der.user@...glemail.com>,
	"JK (Jesper Agerbo Krogh)" <JK@...ozymes.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Tejun Heo <tj@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: Memory issues with Opteron 6220


* Yinghai Lu <yinghai@...nel.org> wrote:

> On Thu, Feb 9, 2012 at 9:51 AM, Anders Ossowicki <aowi@...ozymes.com> wrote:
> > On Thu, Feb 09, 2012 at 05:11:04PM +0100, Yinghai Lu wrote:
> >> mtrr setting has some problem too.
> >>
> >> [    3.098277] mtrr: your CPUs had inconsistent fixed MTRR settings
> >> [ 3.100001] mtrr: probably your BIOS does not setup all CPUs.
> >> [    3.110000] mtrr: corrected configuration.
> >>
> >> can you boot with "debug ignore_loglevel show_msr=16" ?
> >
> > Yep, right here:
> > http://dev.exherbo.org/~arkanoid/atlas-dmesg-3.2.5-20120209-mtrr.txt
> >
> 
> Too bad, print_cpu_info() calling for AP get removed by some 
> commit.
> 
> now we can not print initial AP register anymore.

Mind sending a patch that puts it back, so that it's printed via 
KERN_DEBUG or such, i.e. does not get emitted in the default 
log. Maybe even tie it to apic=debug or so.

Thanks,

	Ingo
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