[libvirt] cgroup cpuset limited by default?

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? -- Marc-André Lureau