Bug 2138176
| Summary: | [RFE] Postcopy Preemption (libvirt) | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 9 | Reporter: | Peter Xu <peterx> |
| Component: | libvirt | Assignee: | Jiri Denemark <jdenemar> |
| libvirt sub component: | Live Migration | QA Contact: | Fangge Jin <fjin> |
| Status: | CLOSED MIGRATED | Docs Contact: | |
| Severity: | medium | ||
| Priority: | unspecified | CC: | alexander.lougovski, djdumas, jdenemar, jsuchane, lcheng, leobras, lmen, mdean, nilal, peterx, quintela, virt-maint |
| Version: | 9.3 | Keywords: | FutureFeature, MigratedToJIRA, Triaged |
| Target Milestone: | rc | ||
| Target Release: | 9.3 | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2023-09-22 13:14:29 UTC | Type: | Story |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2046606 | ||
| Bug Blocks: | |||
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Description
Peter Xu
2022-10-27 13:49:40 UTC
Peter is there any downside of this feature or can we just enable it automatically without an explicit request from a user? I guess we could enabled it whenever postcopy and multi-fd are enabled... And should it be enabled on both sides of migration or just one of them? (In reply to Jiri Denemark from comment #2) > Peter is there any downside of this feature or can we just enable it > automatically without an explicit request from a user? I guess we could > enabled it whenever postcopy and multi-fd are enabled... Postcopy and multifd are not yet compatible, afaict, so the new preempt mode is not compatible with multifd as well. However yeah if any VM that can enable multifd should also be able to enable preempt when with postcopy, and it should always benefit postcopy, iiuc. Currently one downside of preempt is we haven't gone though enough test, e.g., one known issue is multi channels can cause wrong ordered connections, similar to the multifd bug here: https://bugzilla.redhat.com/show_bug.cgi?id=2137740 I'll need to further look into it, but hopefully shouldn't affect the long term plan of having it by default. > > And should it be enabled on both sides of migration or just one of them? Both sides. Thanks! Jiri, any updates for this one? Thanks, Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug. This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there. Due to differences in account names between systems, some fields were not replicated. Be sure to add yourself to Jira issue's "Watchers" field to continue receiving updates and add others to the "Need Info From" field to continue requesting information. To find the migrated issue, look in the "Links" section for a direct link to the new issue location. The issue key will have an icon of 2 footprints next to it, and begin with "RHEL-" followed by an integer. You can also find this issue by visiting https://issues.redhat.com/issues/?jql= and searching the "Bugzilla Bug" field for this BZ's number, e.g. a search like: "Bugzilla Bug" = 1234567 In the event you have trouble locating or viewing this issue, you can file an issue by sending mail to rh-issues. You can also visit https://access.redhat.com/articles/7032570 for general account information. The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days |