Comment 27 for bug 1289064

Reviewed: https://review.openstack.org/625880
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=52b89734426253f64b6d4797ba4d849c3020fb52
Submitter: Zuul
Branch: stable/rocky

commit 52b89734426253f64b6d4797ba4d849c3020fb52
Author: Stephen Finucane <email address hidden>
Date: Tue Oct 16 17:41:17 2018 +0100

    Fail to live migration if instance has a NUMA topology

    Live migration is currently totally broken if a NUMA topology is
    present. This affects everything that's been regrettably stuffed in with
    NUMA topology including CPU pinning, hugepage support and emulator
    thread support. Side effects can range from simple unexpected
    performance hits (due to instances running on the same cores) to
    complete failures (due to instance cores or huge pages being mapped to
    CPUs/NUMA nodes that don't exist on the destination host).

    Until such a time as we resolve these issues, we should alert users to
    the fact that such issues exist. A workaround option is provided for
    operators that _really_ need the broken behavior, but it's defaulted to
    False to highlight the brokenness of this feature to unsuspecting
    operators.

    Conflicts:
     nova/conf/workarounds.py
     nova/tests/unit/api/openstack/compute/admin_only_action_common.py
     nova/tests/unit/api/openstack/compute/test_migrate_server.py

    NOTE(stephenfin): Conflicts due to removal of
    'report_ironic_standard_resource_class_inventory' option and addition of
    change Iaea1cb4ed93bb98f451de4f993106d7891ca3682 on master.

    Change-Id: I217fba9138132b107e9d62895d699d238392e761
    Signed-off-by: Stephen Finucane <email address hidden>
    Related-bug: #1289064
    (cherry picked from commit ae2e5650d14a2c81dd397727d67b60f9b8dd0dd7)