On 23.01.2015 19:46, Chris Friesen wrote:
> Hi,
>
> I'm running into some problems with libvirt and hoping someone can point
> me at some instructions or maybe even help me out.
>
>
> 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?
Michal
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