On 01/26/2015 06:08 AM, Michal Privoznik wrote:
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.
Okay, thanks. I saw the recent fixes in the git logs.
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?
Libvirt is 1.2.8. Chris