[libvirt-users] state of setvcpus

[Eric Blake]

On 08/09/2013 06:26 AM, Thomas Stein wrote:
> Hello.
> 
> Does someone know in what state setvcpu command is?
> 
> I get:
> 
> virsh # setvcpus gentookvm 4
> error: internal error: cannot change vcpu count of this domain
> 
> and
> 
> error : qemuDomainHotplugVcpus:4087 : internal error: cannot change vcpu
> count of this domain
> 
> Does this work for someone?

It works for xen:// URIs.  Upstream qemu vcpu hotplug is still a work in
progress; I don't know if qemu 1.6 will support it, or if you'll have to
wait for qemu 1.7.  Meanwhile, you can try using 'setvcpus gentookvm
--guest 4' to use the guest agent (assuming you have qemu-ga running in
the guest, and the proper plumbing of the guest agent channel in your
domain XML) to use the guest to take vcpus on- or offline.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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