Re: kvm-88: KVM_APIC_READ: read reserved register b0

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Daniel Bareiro wrote:
> On Friday, 28 August 2009 12:04:02 +0200,
> Christoph Lechner wrote:
> 
>> Hi all,
> 
> Hi Christoph.
Hi.
>  
>> running kvm-88 on a 2.6.26-1-amd64 kernel (stock Debian 5.0 kernel), I
>> get the syslog on the host system flooded with the message:
>>
>> Aug 28 11:49:40 reactor kernel: [124035.611782] KVM_APIC_READ: read
>> reserved register b0
>>
>> [...]
> 
> Also I am observing this behavior in one of my hosts with KVM-88 and
> Linux 2.6.30 compiled both by myself on Ubuntu GNU/Linux Hardy Heron
> server amd64, as I've mentioned in a previous [1] mail. Guests has
> Debian GNU/Linux Lenny with stock kernel 2.6.26.
> 
> I was trying if with model=virtio the problem were solved, but was not
> successful. It would seem that the cause is due to something related to
> hardware of the host (is it possible?), since I have other hosts in
> which I use both the same version of KVM and kernel, also both compiled
> by myself, and I'm not having this problem.

don't know if this is caused by the host hardware. But what I forgot to
mention: I commented out the printk call in lapic.c. This stopped the
flooding, but I know it's only a work around.

- cl

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