[libvirt-users] error: unsupported configuration: block I/O throttling not supported with this QEMU binary

[Osier Yang]

On 2012年11月28日 16:34, hzguanqiang wrote:
> Hi, guys.
> I want to change block I/O throttle using 'virsh blkdeviotune' with vm
> not running, it reported an error:
> # virsh blkdeviotune instance-000000dc /dev/loop0 --total-bytes-sec
> 20000000 --total-iops-sec 20 --config
> error: Unable to change block I/O throttle
> error: unsupported configuration: block I/O throttling not supported
> with this QEMU binary
> I can do this when the vm is running. Is it a bug? How can I fix this
> problem.

It just looks strange, as you can tune when the VM is active. Because
the qemu capabilities is collected during the qemu driver starts up,
which is independant with the domain states.

Probably you will want to debug the qemu capabilities collecting
process.

Osier