Open Stack

Hi,

We have a just added a bunch of machines with slightly different CPU's to our cloud (Ivy bridge in stead of Sandy bridge) and now I have issues with live migration.
I set the following:
libvirt_cpu_mode=custom
libvirt_cpu_model=SandyBridge

Migration from old to the newer CPU's work fine
Migration from old to new do not work.

It looks like this bug to me:
https://bugs.launchpad.net/nova/+bug/1082414
Seems that work has been abandoned on it though :(

Has it been fixed in some other way already? 

Cheers,
Robert van Leeuwen