Hi,
I tried to enable virtio-blk data plane feature for VMs in my openstack environment, the hypervisor is ubuntu 14.04, libvirt 1.2.2 and QEMU 2.0.
As nova doesn't support that parameter yet, I did belows
1. nova boot a VM with raw disk image.
2. nova stop the VM.
3. run "virsh edit <instance-id>" on the hyprvisor node, and adding below into instance xml just before </domain>.
However, the <qemu:commandline> part is ignored and not saved after closing virsh edit, seems that libvirt rejected these changes. Is there any XML syntax error here? Or libvirt doesn't support <qemu:commandline> tag?
<qemu:commandline>
<qemu:arg value='-set'/>
<qemu:arg value='device.drive-virtio-disk0.x-data-plane=on'/>
</qemu:commandline>
Regards,
Chengyuan.
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