Thanks for the suggestion, but Cgroups is installed and started. As I mentioned, everything works for the root user. Should I do some special configuration for a non-root user? Currently, my /etc/cgconfig.conf contains the following:

mount {
cpuacct = /mnt/cgroups/cpuacct;
}

Thanks,

Anton

On Fri, Aug 17, 2012 at 11:24 PM, Olivier Doucet <webmaster@ajeux.com> wrote:

Hi,

> libvir: QEMU Driver error : Requested operation is not valid: cgroup CPUACCT
> controller is not mounted

You need to install/configure Cgroups on your system :
http://en.wikipedia.org/wiki/Cgroups
https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Resource_Management_Guide/ch01.html

Olivier