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@gmail.com>
To: libvirt-users@redhat.com
Sent: Tuesday, March 19, 2013 3:00:53 PM
Subject: [libvirt-users] 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

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