[libvirt] Unable to create cgroup for driver

[Jun Koi]

On Tue, Aug 11, 2009 at 6:00 PM, Daniel P. Berrange<berrange at redhat.com> wrote:
> On Tue, Aug 11, 2009 at 10:03:32AM +0900, Jun Koi wrote:
>> Hi,
>>
>> The libvirt 0.7 has a following error when i start libvirtd:
>>
>> warning : qemudStartup:521 : Unable to create cgroup for driver: No
>> such device or address
>
> That is not an error, it is a expected warning if you don't have any
> cgroups mount. It is designed to continue working
>

Could you explain what is that cgroups mount, and why I need that??

The fact is that I never had this problem before (with older git version)

>> Then it fails to start.
>>
>> How can I fix this?
>
> You'll need to provide more information than this. What exactly fails
> to start ? The entire daemon, just the QEMU driver, or something else ?
> Does it exit, does it crash ? Get a debug log when it fails, etc

When I run "libvirtd -v", it simply reports error like:

"warning : qemudStartup:521 : Unable to create cgroup for driver: No
such device or address
Segmentation fault"

Thanks,
J