Bug 890921

Summary:	Better to give visual prompts when migration failed due to xbzrle is disabled on dst host
Product:	Red Hat Enterprise Linux 7	Reporter:	Qunfang Zhang <qzhang>
Component:	qemu-kvm	Assignee:	Orit Wasserman <owasserm>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0	CC:	hhuang, juzhang, knoel, michen, owasserm, quintela, virt-maint
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-12-18 14:55:08 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Qunfang Zhang 2012-12-31 06:26:27 UTC

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:

Comment 2 Orit Wasserman 2013-12-18 14:55:08 UTC

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