[libvirt] [PATCH RESEND RFC v4 1/6] Introduce the function virCgroupForVcpu

Eric Blake eblake at redhat.com
Thu Jul 21 16:26:27 UTC 2011

On 07/21/2011 09:25 AM, Adam Litke wrote:
>> We need to remember to update the VM cgroup if we change the
>> number of vCPUs on a running guest of course
> When can this happen?  Does libvirt support cpu hotplug?

Libvirt - yes, via virDomainSetVcpusFlags and similar API.  Hypervisors 
- different story.  Xen supports it, and at one point, qemu used to, but 
the qemu implementation was so buggy that current qemu does not support 
cpu hotplug.

Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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