Comment 12 for bug 1845146

Reviewed: https://review.opendev.org/687404
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=32713a4fe885ee55ef0fefc8ce6c78877f2f03e7
Submitter: Zuul
Branch: master

commit 32713a4fe885ee55ef0fefc8ce6c78877f2f03e7
Author: Artom Lifshitz <email address hidden>
Date: Tue Oct 8 15:23:47 2019 -0400

    NUMA LM: Add func test for bug 1845146

    Bug 1845146 was caused by the update available resources periodic task
    running during a small window in which the migration was in 'accepted'
    but resource claims had been done. 'accepted' migrations were not
    considered in progress before the fix for 1845146 merged as commit
    6ec686c26b, which caused the periodic task to incorrectly free the
    migration's resources from the destination. This patch adds a test
    that triggers this race by wrapping around the compute manager's
    live_migration() (which sets the 'queued' migration status - this was
    actually wrong in 6ec686c26b, as it talks about 'preparing') and
    running the update available resources periodic task while the
    migration is still in 'accepted'.

    Related bug: 1845146

    Change-Id: I78e79112a9c803fb45d828cfb4641456da66364a