Hi All:
As [1], [2] shows, at the last stage in VM migration, it will call
unplug_vifs(), and then migrate_instance_finish(), in which update_port will
be called immediately. I think the two steps should be executed without no
disturb., but in my test, there is at least 3 seconds between unplug vif and
update_port.
As I want to do something with my controller at the two points, so I have
tested it many times, and the lasting time remains about 3s.
Any comment will be appreciate! Thanks!
[1] http://paste.openstack.org/show/198298/
[2] http://paste.openstack.org/show/568983/
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