Running periodic task during live migration results in incorrect usage
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| | OpenStack Compute (nova) |
Medium
|
Stephen Finucane | ||
| | Train |
Undecided
|
Unassigned | ||
| | Ussuri |
Undecided
|
Unassigned | ||
Bug Description
With the introduction of NUMA-aware live migration in Train, we now do proper claiming and, if necessary, unclaiming of resources at the destination host. However, the latter uses the same mechanism as resize/cold migrate confirm/revert, which means its subject to the same races as those highlighted in bug 1879878. This bug tracks the live migration side of the work to fix that.
| tags: | added: numa |
| tags: | added: libvirt live-migration |
| Changed in nova: | |
| status: | New → Confirmed |
| importance: | Undecided → Medium |
| assignee: | nobody → Stephen Finucane (stephenfinucane) |
Reviewed: https:/
Committed: https:/
Submitter: Zuul
Branch: master
commit 99850a04812fe15
Author: Stephen Finucane <email address hidden>
Date: Thu Sep 3 12:56:41 2020 +0100
Add reproducer for bug #1894095
As with the resize/cold migration confirm/resize flow, the rolling back
of live migrations can be racy due to us doing various things without
the benefit of locks. Add a reproducer demonstrating this.
Change-Id: I276d2bbce4a039
Signed-off-by: Stephen Finucane <email address hidden>
Related-Bug: #1894095
Related-Bug: #1879878
Related fix proposed to branch: master
Review: https:/