Cloned from launchpad blueprint https://blueprints.launchpad.net/neutron/+spec/ml2-use-dpdkvhost.
Intel(R) DPDK UserSpace vhost is a high-throughput implementation of the
standard qemu vhost interface for qemu versions <2.0.
At present neutron cannot report to nova if a virtual switch requires
the DPDKVHOST backend. To support DPDKVHOST in nova and neutron
enhancements to mech_openvswitch and mechanism_odl are required.
Specification URL (additional information):