> > The migration shouldn't end up being set to 'reverting' twice because of > the expected_task_state set and check in > instance.save(expected_task_state=None). The quota reservation could > happen twice, so a rollback in the case of a failure in instance.save > could be good. A patch uploaded to fix this small windows at https://review.openstack.org/#/c/56288/ . --jyh