RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Description of problem:
Migration a guest with xbzrle=on on source host and xbzrle=off on destination host. Migration will fail to load on dst host. Currently the error prompt is not very clear and it will be fine to improve it.

Version-Release number of selected component (if applicable):
kernel-3.6.0-0.29.el7.x86_64
qemu-kvm-1.2.0-21.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Boot guest on source host and also on dst host with listening mode.

2. Enable xbzrle on source host
(qemu) migrate_set_capability xbzrle on
(qemu) info migrate_capabilities
capabilities: xbzrle: on 

3. Leave the xbzrle as default disabled on destination host
(qemu) info migrate_capabilities
capabilities: xbzrle: off

4.Migrate guest from source host to destination host.
  
Actual results:
On destination host:
(qemu) qemu: warning: error while loading state section id 2
load of migration failed


Expected results:
Better to have some more prompt to let user know the xbzrle is not enabled.
Like:
Failed to load XBZRLE page, it's not enabled!
load of migration failed


Additional info:

I'm closing this bug because XBZRLE no longer requires enablement in the destination.