linux-kernel - Re: Memory issues with Opteron 6220

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Date:	Thu, 9 Feb 2012 14:28:25 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andreas Herrmann <herrmann.der.user@...glemail.com>,
	jk@...ozymes.com, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Tejun Heo <tj@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: Memory issues with Opteron 6220


* Anders Ossowicki <aowi@...ozymes.com> wrote:

> I went digging through the power management options of the 
> bios and found that CPU performance was set to System DBPM[1] 
> by default. After switching it to OS DBPM, powernow-k8 seemed 
> a lot happier:

Your bootlog says:

[    0.330000] Performance Events: Broken BIOS detected, complain to your hardware vendor.
[    0.330000] [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR c0010200 is 1430076)

Do you get that message if DBPM is enabled?

If the message disappeared then I'd suggest to do what that 
kernel message suggests and ask the vendor to disable that BIOS 
option by default, it breaks stuff.

Thanks,

	Ingo
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