Comment 11 for bug 1789074

Reviewed: https://review.openstack.org/599506
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=e7ac7a1e03b9d703c42a3eea45594ab5980e4b7f
Submitter: Zuul
Branch: stable/rocky

commit e7ac7a1e03b9d703c42a3eea45594ab5980e4b7f
Author: Moshe Levi <email address hidden>
Date: Thu Aug 23 14:25:04 2018 +0300

    libvirt: skip setting rx/tx queue sizes for not virto interfaces

    It seem that if driver name is None nova try to set
    rx_queue_size tx_queue_size config. (they define the
    virtio-net rx/tx queue sizes). Direct/Physical Direct
    vnic_types are not vritio so this kind of config is
    invalid and causing booting guest to failed. To avoid
    issues we skip such configuration these vnic_types

    Closes-Bug: #1789074

    Change-Id: I45532896690ad9505f2b09c98d8d86b61bcfef2b
    (cherry picked from commit 622ebf2fab0a9bf75ee12437bef28f60e083f849)