Bug 660239
| Summary: | clock drift when migrating a guest between mis-matched CPU clock speed | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | RHEL Program Management <pm-rhel> |
| Component: | kvm | Assignee: | Virtualization Maintenance <virt-maint> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | urgent | Docs Contact: | |
| Priority: | urgent | ||
| Version: | 5.5.z | CC: | bcao, cpelland, cww, danken, dougsland, gcosta, iheim, jwest, mjenner, mkenneth, pm-eus, spurrier, tburke, virt-maint, xtian, zamsden |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | kvm-83-164.el5_5.28 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-12-20 17:37:10 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: | 655990 | ||
| Bug Blocks: | 556823, 580948 | ||
|
Description
RHEL Program Management
2010-12-06 08:22:15 UTC
It has been verified on AMD host with kernel-2.6.18-194.26.1.el5 with kvm-83-164.el5_5.29 the result is as following: ntpdate -q clock.redhat.com server 66.187.233.4, stratum 1, offset 1.878373, delay 0.29205 14 Dec 09:26:15 ntpdate2601: step time server 66.187.233.4 offset 1.878373 sec ntpdate -q clock.redhat.com server 66.187.233.4, stratum 1, offset 1.879503, delay 0.29243 14 Dec 09:26:22 ntpdate2602: step time server 66.187.233.4 offset 1.879503 sec ntpdate -q clock.redhat.com server 66.187.233.4, stratum 1, offset 1.879385, delay 0.28969 14 Dec 09:26:38 ntpdate2603: step time server 66.187.233.4 offset 1.879385 sec ntpdate -q clock.redhat.com server 66.187.233.4, stratum 1, offset 1.849693, delay 0.27289 14 Dec 09:30:29 ntpdate2610: step time server 66.187.233.4 offset 1.849693 sec ntpdate -q clock.redhat.com server 66.187.233.4, stratum 1, offset 1.837023, delay 0.27748 14 Dec 09:32:33 ntpdate2615: step time server 66.187.233.4 offset 1.837023 sec ntpdate -q clock.redhat.com server 66.187.233.4, stratum 1, offset 1.829853, delay 0.27637 14 Dec 09:34:21 ntpdate2619: step time server 66.187.233.4 offset 1.829853 sec vi ntpdate.result ntpdate -q clock.redhat.com server 66.187.233.4, stratum 1, offset 1.774460, delay 0.30309 On Intel host with different TSC rate ,Verified on # uname -r 2.6.18-194.30.1.el5 # rpm -q kvm kvm-83-164.el5_5.29 Actual Results: No time shift after migration. Base on above and comment #9, this issue has been fixed ald. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0998.html |