Comment 2 for bug 1658070

The message for error vm:
Port update failed for port cfc947be-1975-42f3-95bd-f261a2eccec0: Unable to correlate PCI slot 0000:81:11.7

in nova code: https://github.com/openstack/nova/blob/065cd6a8d69c1ec862e5b402a3150131f35b2420/nova/network/neutronv2/api.py#L2411

For evacuation with host pci_mapping is empty