As an installer, I need this to extend the size of RX/TX (packets), so that I can minimize packet loss.
Purpose of function:
Provide the ability to set RX and TX queue size of guests, either on a guest-by-guest basis, or on a per-virtualisation-host basis, to help performance (to fix performance packet loss):
* OpenStack (Nova and/or Neutron)
* OSP-d (to facilitate installation with predefined defaults)