Re: [libvirt-users] questions around using numatune/numa/schedinfo

On 23.01.2015 19:46, Chris Friesen wrote:

> First, are there any requirements on qemu version in order to use the > "numatune" and/or "cpu/numa/cell" elements? Or do they use cgroups and > not the native qemu numa support? For numatune you need a qemu with 'memory-backend-{ram,file}' objects. Those were introduced in qemu-2.1.0. As of libvirt, you'll need libvirt-1.2.7 at least. Although the newer the better - there were couple of fixes recently.

> Second, are there any instructions on how to set up cgroups? I > initially hadn't had cgroups mounted and running "virsh schedinfo > <domain>" gave an error. So I mounted "/sys/fs/cgroup/memory" and > "/sys/fs/cgroup/cpu" and restarted libvirtd but running "virsh schedinfo > <domain>" still gives an error: > > root@compute-1:~# virsh schedinfo 8 > Scheduler : Unknown > error: Requested operation is not valid: cgroup CPU controller is not > mounted > > What am I missing? > > What's the libvirt version?