Comment 3 for bug 1604924

Reviewed: https://review.openstack.org/344997
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=ca60a91cbd3668c469313a3bd6c0c99aeff30a74
Submitter: Jenkins
Branch: master

commit ca60a91cbd3668c469313a3bd6c0c99aeff30a74
Author: Sean Mooney <email address hidden>
Date: Mon Jul 18 04:19:04 2016 +0000

    adds support for vhost user reconnect.

    - vhost-user reconnect is a new feature added
      in dpdk 16.07 and qemu 2.7.
    - vhost-user reconnect allows VMs using vhost-user
      interfaces to reconnect to the vhost-user backend if
      the backend terminates either as a result of a graceful
      shutdown or a crash with out requiring the vm to reboot.
    - vhost-user reconnect requires qemu to be the vhost-user server
      and ovs to be the client.
    - dpdk prior to 16.07 only supports qemu client/ dpdk server mode.
    - This change extends the ovs mech driver to select the correct qemu
      vhost user socket mode based on the available interface types
      reported by the agent.

    Change-Id: Iec89eaa597311e086c5f6e8d67308d446b07ac33
    Closes-Bug: #1604924
    Depends-on: Ia5da5b3ef28d1b23b217adc5196199df47b54ed9