Bug 592296

Summary:	KVM should support the newer set of MSRs for kvmclock
Product:	Red Hat Enterprise Linux 6	Reporter:	Glauber Costa <gcosta>
Component:	kernel	Assignee:	Glauber Costa <gcosta>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	high
Version:	6.0	CC:	arozansk, mjenner, qcai, szhou, tburke
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	624983 (view as bug list)		Environment:
Last Closed:	2010-11-11 15:50:57 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:
Bug Depends On:
Bug Blocks:	533943, 569603, 624983

Description Glauber Costa 2010-05-14 13:47:19 UTC

Description of problem:

KVM has deprecated the current msr set used by kvmclock, and came up with a new set. While the old set is still working, and will, during the lifetime of RHEL6,
in a 7 year period, it is likely that new guests will appear that uses only the newer set. We should, therefore, support both.

Comment 1 RHEL Program Management 2010-05-14 14:30:46 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

Comment 5 Aristeu Rozanski 2010-05-18 21:13:52 UTC

Patch(es) available on kernel-2.6.32-27.el6

Comment 10 Shirley Zhou 2010-08-18 10:10:13 UTC

Test this bug with kernel-2.6.32-63.el6 as following

1.start guest fc15, kernel is 2.6.36-0.0.rc0.git1.fc15.i686.PAE
2.check dmesg info 
dmesg|grep kvm
kvm-clock: Using msrs 12 and 11
kvm-clock: cpu 0, msr 0:c4a081, boot clock
kvm-clock: cpu 0, msr 0:3149081, primary cpu clock
kvm-clock: cpu 1, msr 0:3349081, secondary cpu clock
Switching to clocksource kvm-clock

From dmesg, no newer msr available. 
After talk with Glauber through IRC, Glauber think qemu lack patch to make it work, open qemu Bug 624983 to track this issue. 
Change status to verified as patch added.

Comment 11 releng-rhel@redhat.com 2010-11-11 15:50:57 UTC

Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.