Comment 4 for bug 1497027

Reviewed: https://review.openstack.org/221508
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=27f60c314bc9de5d81571de1437f93ca232f1382
Submitter: Jenkins
Branch: master

commit 27f60c314bc9de5d81571de1437f93ca232f1382
Author: Mathieu Gagné <email address hidden>
Date: Tue Sep 8 17:07:07 2015 -0400

    Add neutron-linuxbridge-cleanup util

    Removal of empty bridges have been disabled [1] to fix a race condition
    between Nova and Neutron where a bridge would be removed if
    the only instance using it is rebooted. This means empty bridges
    will pile up over time.

    This script can be used to periodically remove empty bridges by running it
    on compute nodes.

    Note: Usage of this script can still trigger the original race condition.
    It should be used when you don't expect anyone do be doing operations
    on their instances.

    [1] Commit 8dd8a7d93564168b98fa2350eedf56acede42b0f

    DocImpact: Add neutron-linuxbridge-cleanup util
    Related-bug: #1328546
    Closes-bug: #1497027
    Co-Authored-By: Cedric Brandily <email address hidden>
    Change-Id: Ieb2796381579ad295abf361ce483d979a53d2bd6