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live-migration - libvirt - invtsc

Hi all,

I'm using openstack on Debian, with icehouse apt mirror.

Installing new compute nodes yesterday seems to break live migration from these new hosts. Libvirt installed version is now 1.2.7-11~bpo70+1 and seems to introduce a new cpu feature :

$ virsh capabilities : 

      <topology sockets='1' cores='4' threads='2'/>
      <feature name='invtsc'/>


When I try a live migrate, I get an error in the nova-compute.log of the host from which the instance should be migrating :

Live Migration failure: Requested operation is not valid: domain has CPU feature: invtsc

I googled it, and didn't find a lot of answers, mainly this post confirming that it is a libvirt issue.

Does anyone has had this issue ? Is there any workaround to be able to live-migrate from these newly installed hosts ?