Bug 523478

Summary:	Need disable hwclock to fix the the problem of guest 1.5~2 later than host after boot
Product:	Red Hat Enterprise Linux 5	Reporter:	lihuang <lihuang>
Component:	kvm	Assignee:	Glauber Costa <gcosta>
Status:	CLOSED WONTFIX	QA Contact:	Lawrence Lim <llim>
Severity:	medium	Docs Contact:
Priority:	low
Version:	5.4	CC:	ehabkost, gcosta, mhideo, ndai, ovirt-maint, rlerch, tburke, tools-bugs, virt-maint, wnefal+redhatbugzilla, ykaul
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	Booting a Linux guest causes 1.5 to 2 second time drift from the host time when the default hwclock service starts. It is recommended to disable the hwclock service. Alternatively, enable the ntp service so ntp can correct the time once the ntp service starts.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-01-14 21:40:28 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:	580948, 656090

Comment 1 Dor Laor 2009-10-01 08:45:16 UTC

Release note added. If any revisions are required, please set the 
"requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly.
All revisions will be proofread by the Engineering Content Services team.

New Contents:
Guest boot will cause 1 1.5-2 second gap from the host time when the default hwclock command runs by the guest init scripts. It is recommended to disable it or alternatively use ntp to sync time afterwards.

Comment 2 Christopher Curran 2009-10-23 01:14:19 UTC

Release note updated. If any revisions are required, please set the 
"requires_release_notes"  flag to "?" and edit the "Release Notes" field accordingly.
All revisions will be proofread by the Engineering Content Services team.

Diffed Contents:
@@ -1 +1 @@
-Guest boot will cause 1 1.5-2 second gap from the host time when the default hwclock command runs by the guest init scripts. It is recommended to disable it or alternatively use ntp to sync time afterwards.+Booting a Linux guest causes 1.5 to 2 second time drift from the host time when the default hwclock service starts. It is recommended to disable the hwclock service. Alternatively, enable the ntp service so ntp can correct the time once the ntp service starts.

Comment 7 RHEL Program Management 2011-01-11 20:44:44 UTC

This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated in the
current release, Red Hat is unfortunately unable to address this
request at this time. Red Hat invites you to ask your support
representative to propose this request, if appropriate and relevant,
in the next release of Red Hat Enterprise Linux.

Comment 8 RHEL Program Management 2011-01-11 22:47:09 UTC

This request was erroneously denied for the current release of
Red Hat Enterprise Linux.  The error has been fixed and this
request has been re-proposed for the current release.