Comment 9 for bug 1836023

Reviewed: https://review.opendev.org/670501
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=fe403825ab08728e8b2d0fe15cfba3b452921f57
Submitter: Zuul
Branch: stable/pike

commit fe403825ab08728e8b2d0fe15cfba3b452921f57
Author: Oleg Bondarev <email address hidden>
Date: Wed Jul 10 12:39:13 2019 +0400

    Yield control to other greenthreads while processing trusted ports

    process_trusted_ports() appeared to be greenthread unfriendly, so
    if there are many trusted ports on a node, openvswitch agent may
    "hang" for a significant time.
    This patch adds explicit yield.

    Change-Id: I7c00812f877e2fc966bbac3060e1187ce1b809ca
    Closes-Bug: #1836023
    (cherry picked from commit da539da3780188f01e18ef106dde9ca180324c2a)