Comment 4 for bug 1734204

Reviewed: https://review.openstack.org/599413
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=5e69018038176a60abbb3c879ae7ac7f12b8341a
Submitter: Zuul
Branch: stable/rocky

commit 5e69018038176a60abbb3c879ae7ac7f12b8341a
Author: Sahid Orentino Ferdjaoui <email address hidden>
Date: Tue Jan 9 06:46:03 2018 -0500

    hardware: fix memory check usage for small/large pages

    When huge pages are requested, we need to examine the host cell's
    specific huge page amounts, not the amount of physical memory
    associated with the host NUMA node.

    Also when no pagesize is requested we should consider to compute
    memory usage based on small pages since the amount of physical memory
    available may also include some large pages.

    The unit-tests has been updated to pass correct NUMACell mempages
    information since the check is not done based on the pages available
    on host. Also that the test 'test_host_usage_contiguous' to reflect to
    correct update of pages availalbes on hist based on instance usage.

    Closes-bug: #1734204
    Change-Id: I5f5c621f2f0fa1bc18ee9a97d17085107a5dee53
    Signed-off-by: Sahid Orentino Ferdjaoui <email address hidden>
    (cherry picked from commit 8241deee197206d5458a61884ce08e1c2c2603d9)