Comment 30 for bug 1751923

@coreycb I think we have everything we need to proceed with this SRU now. Since Queens is the oldest release currently supported on Ubuntu and support for populating vif attach ordering required to rebuild the cache has been available since Newton I think the risk of anyone being impacted is very small. VMs created prior to Newton would need the patch [1] and eventually [2] backported from Stein but I don't see them as essential and given the impact of not having this fix asap I think it supersedes those which we can handle separately.

[1] https://github.com/openstack/nova/commit/3534471c578eda6236e79f43153788c4725a5634
[2] https://bugs.launchpad.net/nova/+bug/1825034