Comment 11 for bug 1849165

Reviewed: https://review.opendev.org/689842
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=80385a22ee480a4c9775148d4729ab5d9c52e76d
Submitter: Zuul
Branch: master

commit 80385a22ee480a4c9775148d4729ab5d9c52e76d
Author: Eric Fried <email address hidden>
Date: Mon Oct 21 11:50:25 2019 -0500

    Don't populate resources for not-yet-migrated inst

    Per the referenced bug, it is possible for update_available_resource to
    race with a migration such that the migration record exists, but the
    instance's migration context doesn't. In such cases we shouldn't try to
    track the instance's assigned resources on this host (because there
    aren't any yet).

    Change-Id: I69f99adfa8c91b50086052ca1b15c55e86ed614d
    Closes-Bug: #1849165