On Mon, Oct 14, 2019 at 10:52:56AM -0500, Ben Nemec wrote:
Okay, circling back to wrap this topic up. It sounds like this is a pretty big win in terms of avoiding random failures either from trying to migrate a VM with nested guests on older qemu or using newer qemu with older OpenStack. Since it's a pretty simple patch and it allows our stable branches to behave more sanely, I'm inclined to go with the backport. If anyone strongly objects, please let me know ASAP before we release it.
It's a little strange but from a stable POV it's okay to backport. We had to do something similar after meltdown, as kernel fixes for that introduced 'anti-features we needed to account for that clearly didn't exist when we built the older releases of OpenStack. Yours Tony.