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[OpenStack Infra <1861510@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/705660
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=a1735c46d8aa3a3df50818ce176e0632592924a7
Submitter: Zuul
Branch:    master

commit a1735c46d8aa3a3df50818ce176e0632592924a7
Author: Maciej Józefczyk <mjozefcz@xxxxxxxxxx>
Date:   Fri Mar 20 11:11:28 2020 +0000

    Don't reschedule hosts unless we need to
    
    Only reschedule gateways/update segments when things have changed
    that would require those actions.
    
    Co-Authored-By: Terry Wilson <twilson@xxxxxxxxxx>
    
    Change-Id: I62f53dbd862c0f38af4a1434d453e97c18777eb4
    Closes-bug: #1861510
    Closes-bug: #1861509


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1861510

Title:
  [OVN] GW rescheduling mechanism is triggered on every Chassis updated
  unnecessarily

Status in neutron:
  Fix Released

Bug description:
  Whenever a chassis is updated for whatever reason, we're triggering
  the rescheduling mechanism [0]. As the current agent liveness check
  involves updating the Chassis table quite frequently, we should avoid
  rescheduling gateways for those checks (ie. when either nb_cfg or
  external_ids change).

  
  [0] https://github.com/openstack/neutron/blob/4689564fa29915b042547bdeb3dcb44bca54e20c/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py#L87

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