When I run virsh blkiotune alias --weight 100 I receive: error: Unable to change blkio parameters error: this function is not supported by the connection driver: blkio cgroup isn't mounted But I have mounted blkio: cgroup /dev/cgroup/cpu cgroup rw,relatime,cpu 0 0 cgroup /dev/cgroup/cpuacct cgroup rw,relatime,cpuacct 0 0 cgroup /dev/cgroup/devices cgroup rw,relatime,devices 0 0 cgroup /dev/cgroup/blkio cgroup rw,relatime,blkio 0 0 cgroup /dev/cgroup/freezer cgroup rw,relatime,freezer 0 0 cgroup /dev/cgroup/cpuset cgroup rw,relatime,cpuset 0 0 why it is not worked? -- Nikita A Menkovich http://libc6.org/ JID: menkovich@gmail.com Tel: +7 (921) 423-96-48