[libvirt-users] CPU Model detection with virsh capabilities

Olivier BONHOMME obonhomme at nerim.net
Mon Sep 5 10:10:38 UTC 2011

Le 02/08/2011 10:51, Olivier BONHOMME a écrit :
> Hello everybody,
> I am a new user discovering libvirt with KVM software. During my first
> VM creation, I saw an issue with virsh that I can't understand.
> I wanted to emulate another CPU than the classical qemu32 using virsh.
> So I used the virsh capabilites command to detect how is detected my CPU
> host which is an Intel Xeon E5410 and my problem is that this CPU is
> detected only with the cpumodel "pentium3".
> But if use the kvm -cpu ? command, it returns me the following
> capabilities :
> $ kvm -cpu ?
> x86 qemu64
> x86 phenom
> x86 core2duo
> x86 kvm64
> x86 qemu32
> x86 coreduo
> x86 486
> x86 pentium
> x86 pentium2
> x86 pentium3
> x86 athlon
> x86 n270
> Moreover, if i decide to use the pentium3 cpumodel for my KVM VM, the
> CentOS freeze during its loading.
> My libvirt and kvm are the following on a Debian Squeeeze :
> $ virsh version
> Compiled against library: libvir 0.8.3
> Using library: libvir 0.8.3
> Using API: QEMU 0.8.3
> Running hypervisor: QEMU 0.12.5
> Does anybody already had the same issue or am I doing anything wrong ?

Hello again,

I am still locked with that issued about capabilities detection. I tried 
to look on the doc but can't find anything. Does anybody has an entry 
point for that or should it be considered as a bug ?

Thanks again


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