Comment 5 for bug 1397381

Reviewed: https://review.openstack.org/140357
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=08290cec7f02fa908dfda89d1749142d2d520f48
Submitter: Jenkins
Branch: master

commit 08290cec7f02fa908dfda89d1749142d2d520f48
Author: Nikola Dipanov <email address hidden>
Date: Tue Dec 9 15:58:48 2014 +0100

    libvirt: Fix NUMA memnode assignments to host cells

    This fix

      https://review.openstack.org/138128

    breaks assignments for NUMA topologies where host cell ID
    that the instance cell is pinned to is not in increasing order. The
    reason for this is that the main loop of the method that will go through
    the host cells (always in ascending order), and find instance cells that
    match (may not be in ascending order depending on how the fitting logic
    and usage of the host) but we simply append memnodes so they may end up
    in the wrong order when we hit the normalization loop.

    We fix this by "pre-allocating" the memnodes list and making sure to add
    the matching memnode to the same position as the guest config cell
    before hitting the normalization loop.

    Change-Id: I91055dc705f2ef54c830e641f9cf9ba0683eb313
    Closes-bug: #1397381