Comment 1 for bug 1809083

All those changes are in qemu 3.0 and later so there it will be covered by our merge of qemu 3.1
Once that is done we can consider adding the three changes linked here to the qemu in Bionic and Cosmic.

For your wondering "I'm not sure that fixing backward migration meets the criteria for an SRU.":
- it is not guaranteed to be working (not fully supported)
- but if one provides the means (fixes, howto) avoid issue we are willing to help getting them applied

For your wondering about "why Canonical didn't pick up the latest stable release":
- in the past there were issues with qemu stable releases causing issues on updates (this was before my time so no details).
- Due to these issues an SRU exception for those minor release updates was nacked by our Service folks
- in the meantime testing in general got much better so I was planning to suggest an SRU exception for qemu stable releases from 20.04 onwards (just intention so far, nothing committed into plans so far)