Comment 23 for bug 1082414

Reviewed: https://review.openstack.org/53746
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=79a0755597f4983367eb0caf4669ffb881b4f720
Submitter: Jenkins
Branch: master

commit 79a0755597f4983367eb0caf4669ffb881b4f720
Author: yunhong jiang <email address hidden>
Date: Fri Feb 6 07:03:45 2015 -0800

    libvirt: fix overly strict CPU model comparison in live migration

    The current libvirt driver migration code checks whether the
    dest host can support the guest, by comparing the source host
    CPU model. This is overly strict, as the guest may well be
    running with a more restrictive CPU model that hides many
    host features. The correct approach is to compare against
    the guest's configured CPU model.

    To achieve the compatibility when migrate instance from old compute
    node which does not provide vcpu_model in instance object, the source
    host's compute info is still provided.

    Co-authored: Daniel P. Berrange <email address hidden>
    Co-authored: Yunhong Jiang <email address hidden>

    Closes-Bug: 1082414

    Change-Id: I65f505fec64c65d2641d2bfd940cde44bcd83a78