On 05/29/2013 04:28 AM, Eric Blake wrote:
On 05/28/2013 02:24 PM, Eric Blake wrote:
So the question is: is there any method I can't find yet to change the vcpu count of a running vm dynamically? Wait for newer qemu and libvirt, or else pitch in and help write patches. You might not have to wait that long - if you could help test these patches, it would be appreciated:
https://www.redhat.com/archives/libvir-list/2013-May/msg01857.html
Hi, After apply the patch, I've made a test. The testing environment as: virsh # version Compiled against library: libvirt 1.0.5 Using library: libvirt 1.0.5 Using API: QEMU 1.0.5 Running hypervisor: QEMU 1.5.0 The xml piece of the vm domain: <channel type='unix'> <source mode='bind' path='/var/lib/libvirt/qemu/f16x86_64.agent'/> <target type='virtio' name='org.qemu.guest_agent.0'/> </channel> the network connection between the vm and host is ok. Also I installed the qemu-guest-agent in the guest os: [root@localhost ~]#rpm -qa | grep qemu-guest qemu-guest-agent-0.12.1.2-2.355.el6.i686 An error happened when I try to offline a guest vcpu in virsh: virsh # setguestvcpu 8 1 --offline error: Guest agent is not responding: Guest agent not available for now Is there some step I missed before I invoke the 'setguestvcpu' command in virsh or I need to write a program to hot-plug/unplug the vcpu with the help of the new API introduced by this patch? Thanks! BRs, Dennis