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RE: [Xen-devel] RE: kernel panic when enable x2apic

To: Jan Beulich <JBeulich@xxxxxxxxxx>, Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] RE: kernel panic when enable x2apic
From: "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx>
Date: Tue, 30 Nov 2010 08:58:15 +0800
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Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Han, Weidong" <weidong.han@xxxxxxxxx>
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Thread-topic: [Xen-devel] RE: kernel panic when enable x2apic
hi Jan, weidong is looking into this issue. It is interesting is that, he can 
reproduce this issue in an older changeset in his box. So I am not sure whether 
there has another issue in my box. We will let you know ASAP when we get 

best regards

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@xxxxxxxxxx]
> Sent: Friday, November 19, 2010 7:09 PM
> To: Sander Eikelenboom
> Cc: Han, Weidong; Zhang, Yang Z; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] RE: kernel panic when enable x2apic
> >>> On 19.11.10 at 11:40, Sander Eikelenboom <linux@xxxxxxxxxxxxxx> wrote:
> > Hello Jan,
> >
> > Friday, November 19, 2010, 11:17:21 AM, you wrote:
> >
> >>>>> On 18.11.10 at 05:53, "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx>
> wrote:
> >>> From this output, it shows the cpupool_id = 7f034000, I don't know why it
> >>> was 7f034000. I think the first cpupool_id should be 0?Am I right?
> >
> >> Yes, it ought to be zero.
> >
> >>> Also the fail with write mtrr MSR, the value also is very strange:
> >>> ffff83007f0f7670, it totally different with the SDM says.
> >>> (XEN) MTRR: CPU 0: Writing MSR 200 to ffff83007f0f7670 failed
> >
> >> Yes, I had indicated so in an earlier reply.
> >
> >>> So, I am think that maybe the heap is broken?
> >
> >> General memory corruption is more likely. The question is when it
> >> starts.
> >
> > General memory corruption could also be hardware related (bad dimm) ?
> In general, yes, but this wouldn't normally lead to patterns that look
> like valid (albeit misplaced) addresses, I would think.
> Jan

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