Saurabh, please make sure blkio controller has been mounted on your host firstly then need to restart libvirtd service after manually mounting it. # lssubsys cpuset cpu cpuacct memory devices freezer net_cls blkio or # grep blkio /proc/mounts cgroup /cgroup/blkio cgroup rw,relatime,blkio 0 0 -- Regards, Alex ----- Original Message ----- From: "Saurabh Deochake" <saurabh.d04@xxxxxxxxx> To: libvirt-users@xxxxxxxxxx Sent: Tuesday, March 19, 2013 3:00:53 PM Subject: Errors while using blkiotune command Hi all, I want to limit the I/O bandwidth inside the container, so I used virsh command blkiotune. But when I enter a command: virsh # blkiotune lxcguest --weight 250 I get following errors: error: Unable to change blkio parameters error: Requested operation is not valid: blkio cgroup isn't mounted I also have blkio cgroup mounted. What can be the problem? Thanks in advance. Regards, Saurabh Deochake _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users