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Re: [libvirt] vcpuinfo returns wrong CPU value for kvm



On Tue, Apr 14, 2009 at 09:53:51PM +0200, Gerrit Slomma wrote:
> vcpuinfo returns a wrong value for kvm with libvirt 0.6.2:

> Furthermore even when pinning all - in my case both - vCPUs of the 
> domain to the second CPU of the node virsh reports the first cpu as the 
> assigned cpu.
> 
> virsh # vcpupin rr019v3 0 1
> virsh # vcpuinfo rr019v3
> VCPU:           0
> CPU:            0
> Status:         laufend
> CPU-Affinit├Ąt: -y
> 
> VCPU:           1
> CPU:            0
> Status:         laufend
> CPU-Affinit├Ąt: -y
> 
> 
> Watching at the code in virsh.c i am a little bit on my wits end where 
> virVcpuInfoPtr is defined as i am no c-programmer - only some java on my 
> side.

Unfortunately the answer is rather simple. We never fill in any value
for the 'cpu' field of virVcpuInfo for QEMU/KVM guests, which means 
the 'CPU:' line should by virsh will always be zero. We need to fix 
this in the QEMU driver.


Regards,
Daniel
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