Bug 525873

Summary:	Support for cpuid masking per domU with Xen hypervisor
Product:	Red Hat Enterprise Linux 5	Reporter:	Pasi Karkkainen <pasik>
Component:	kernel-xen	Assignee:	Xen Maintainance List <xen-maint>
Status:	CLOSED WONTFIX	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.5	CC:	clalance, drjones, jzheng, minovotn, xen-maint
Target Milestone:	rc
Target Release:	5.6
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-03-17 11:52:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Pasi Karkkainen 2009-09-26 14:19:35 UTC

Description of problem:

Xen hypervisor in RHEL5 doesn't support cpuid masking. It's a required feature for cross CPU-vendor live-migrations, and to work-around bugs in guest PV kernels, like for example:
https://bugzilla.redhat.com/show_bug.cgi?id=525290

Version-Release number of selected component (if applicable):
5.x

How reproducible:
This feature does not exist in RHEL5 Xen.

Additional info:
Support for CPUID masking was initially added in upstream Xen 3.3.0.
http://www.nabble.com/Xen-3.3-News:-3.3.0-release-available!-td19106008.html

Comment 5 Bill Burns 2010-03-17 11:52:24 UTC

Thanks for the request. But at this time we do not plan to add this support due to low demand and the invasiveness to our code base.

Comment 6 Chris Lalancette 2010-07-19 13:56:24 UTC

Clearing out old flags for reporting purposes.

Chris Lalancette

Comment 7 Laszlo Ersek 2011-09-15 15:11:03 UTC

*** Bug 694492 has been marked as a duplicate of this bug. ***