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Re: AW: Re: [Xen-devel] ACPI problem, was Xen BUG in mm / Xen 4.0.1 with

To: Carsten Schiers <carsten@xxxxxxxxxx>
Subject: Re: AW: Re: [Xen-devel] ACPI problem, was Xen BUG in mm / Xen 4.0.1 with pvops Kernel?
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Tue, 14 Sep 2010 15:05:03 -0700
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx>, JBeulich <JBeulich@xxxxxxxxxx>, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>
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 On 09/14/2010 02:19 PM, Carsten Schiers wrote:
>> But in any case - the root cause is broken firmware.
> Getting deeper into it. The faulty entries seems not to be the CPUxCST, 
> but CPUxIST
> for CPU2 and up. For a reason I don't know, native booting the kernel 
> doesn't run
> into this issue. I have managed to get a veeeeery detailed ACPI debug 
> output now
> from the Xen/Dom0 kernel, will try to do the same with native booted 
> Kernel tomorrow.
> I know already that the natively booting kernel will also run through 4 
> CPUs, even
> though my CPU has only 2 cores. So it must be something different. There 
> is special
> code in the acpi driver section for xen in the pvops kernel...
> Jeremy, did you do it? Who could possibly help? I am not a real 
> specialist...
> Did not attached the log, in case anybody is interested...it's 31MB.

I'm not really an expert on ACPI at all.  I've cc:d some of the Intel
folks who've been very helpful in contributing ACPI changes.


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