QEMU Monitor Command

Check if virtio-blk-data-plane is being used by the KVM guest virtual file-backed raw format image disks.

gstanden@vmem1:~$ sudo virsh qemu-monitor-command --hmp oracle631 'info qtree' | grep x-data

x-data-plane = true

x-data-plane = true

gstanden@vmem1:~$ sudo virsh qemu-monitor-command --hmp oracle632 'info qtree' | grep x-data

x-data-plane = true

x-data-plane = true

gstanden@vmem1:~$ sudo virsh qemu-monitor-command --hmp oracle651 'info qtree' | grep x-data

x-data-plane = true

x-data-plane = true

x-data-plane = true

gstanden@vmem1:~$

Additional notes are available here at Stefan Hajnoczi blog.