Comment 4 for bug 1830456

Reviewed: https://review.opendev.org/661522
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=00eb6f26f6165a00d647d2bf35fb7996534cfc09
Submitter: Zuul
Branch: master

commit 00eb6f26f6165a00d647d2bf35fb7996534cfc09
Author: shenjiatong <email address hidden>
Date: Mon May 27 11:26:49 2019 +0800

    improve dvr port update under large scale deployment

    update port may takes an excessive number of seconds
    to complete if dvr routers are running on more than 100
    compute nodes. This patch tries to save some time by removing
    unnecessary calls inside looping through hosts.

    Change-Id: Ide740e0c5c43c2d2b842460a37c8ce125da12b28
    Closes-Bug: #1830456