Comment 13 for bug 1813708

Reviewed: https://review.openstack.org/648207
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=7865264aaba615f6e52f5806d844531696186d56
Submitter: Zuul
Branch: stable/stein

commit 7865264aaba615f6e52f5806d844531696186d56
Author: LIU Yulong <email address hidden>
Date: Wed Feb 20 19:46:53 2019 +0800

    Divide-and-conquer local bridge flows beasts

    The dump-flows action will get a very large sets of flow information
    if there are enormous ports or openflow security group rules. For now
    we can meet some known exception during such action, for instance,
    memory issue, timeout issue.
    So after this patch, the cleanup action of the bridge stale flows
    will be done one table by one table. But note, this only supports
    for 'native' OpenFlow interface driver.

    Related-Bug: #1813703
    Related-Bug: #1813712
    Related-Bug: #1813709
    Related-Bug: #1813708

    Change-Id: Ie06d1bebe83ffeaf7130dcbb8ca21e5e59a220fb
    (cherry picked from commit f898ffd71fba4f9b8fd9f4cb851fc3976d72396a)