On 04/16/2012 05:34 PM, Marc-André Lureau wrote: > Hi, > > I noticed recently that my system VMs feel much slower, and that seems > to be because of cpuset cgroup which constrain the VM on the first > cpu. This doesn't happen with session VMs, since they are not ruled by > cgroup. I run f17 with libvirt git, the VMs are created with > virt-manager, using mostly default settings > > <vcpu>4</vcpu> > <os> > <type arch='x86_64' machine='pc-0.15'>hvm</type> > <boot dev='hd'/> > </os> > <features> > <acpi/> > <apic/> > <pae/> > </features> > <clock offset='localtime'/> > > Is that intended or is it a bug? > Did you happen to perform a suspend/resume or a hibernation/restore on your computer? (Or did you do CPU hotplug manually?) If yes, you might be seeing the problem reported at: https://bugzilla.redhat.com/show_bug.cgi?id=714271 Unfortunately, as of now the kernel still doesn't handle this properly.. IOW, we don't have a kernel fix (yet). Regards, Srivatsa S. Bhat IBM Linux Technology Center -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list