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Re: [Xen-devel] (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c00

To: "Keir Fraser" <keir.xen@xxxxxxxxx>
Subject: Re: [Xen-devel] (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076.
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Mon, 15 Aug 2011 08:40:36 +0100
Cc: Xen-devel@xxxxxxxxxxxxxxxxxxx, Mark Schneider <ms@xxxxxxxxxxxxxxxxxxxxxx>
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>>> On 14.08.11 at 15:48, Keir Fraser <keir.xen@xxxxxxxxx> wrote:
> You can specify guest_loglvl=error to turn off warning messages, but that
> would turn off other messages that might actually be interesting.
> Alternatively you'd have to disable the message in source code and rebuild
> the hypervisor. Possibly we should reduce this message to debug loglevel
> rather than warning logelevel: I agree the message is very much not a
> rarity.

I tend to disagree - the kernel shouldn't really attempt these writes.
One of the things addressing of which is more cumbersome in pv-ops
(which I assume is in use here) than "classic" kernels.

Jan

> On 14/08/2011 12:08, "Mark Schneider" <ms@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> 
>> Hello,
>> 
>> Where can I switch the following message off?
>> (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from
>> 0x0000000000430076 to 0x0000000000030076.
>> 
>> There are many such messages in the output of "xm dmesg". What is the
>> reason?
>> Is it for debugging purposes or just an issue with my hardware? (HP
>> DL385g7 / AMD CPUs)
>> 
>> Thank you / regards, Mark
> 
> 
> 
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> http://lists.xensource.com/xen-devel 




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