Hi Eric, Thank you for the explanation. On Wed, 15 Dec 2010 08:42:12 -0700 Eric Blake <eblake@xxxxxxxxxx> wrote: > > > > I tested "virsh setvcpus" command and it did not work like the following: > > > > # virsh setvcpus RHEL5.5GA_Guest.img 2 > > error: internal error unable to execute QEMU command 'cpu_set': The command cpu_set has not been ound > > qemu vcpu hot-plugging has been a sore spot for some time now. My > understanding is that an early implementation used to be upstream, but > it was buggy, so current upstream does not support it. RHEL has taken > some efforts to provide vcpu hot-plugging beyond what upstream supports, > but it is still a work in progress, and I haven't personally tested RHEL > 6.0 to see how well it does (most of my vcpu hot-plug testing was done > for RHEL 5.x with xen). > > > > > # > > > > Has this problem been fixed already on upstream ? > > > > o Test environment > > Host OS: RHEL6.0 (x86_64) > > qemu-kvm: 0.12.1.2-2.113.el6 > > libvirt : 0.8.1-27.el6 > > https://bugzilla.redhat.com/show_bug.cgi?id=533138 appears to be > relevant to your situation, and mentions that the issue has been > deferred to at least RHEL 6.1. I see. Thanks Ken'ichi Ohmichi -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list