Bug 624983
| Summary: | QEMU should support the newer set of MSRs for kvmclock | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Shirley Zhou <szhou> |
| Component: | qemu-kvm | Assignee: | Eduardo Habkost <ehabkost> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | high | ||
| Version: | 6.0 | CC: | arozansk, gcosta, juzhang, lihuang, mjenner, mkenneth, mshao, qcai, qzhang, szhou, tburke, virt-maint |
| Target Milestone: | rc | Keywords: | Triaged |
| Target Release: | 6.1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-0.12.1.2-2.188.el6 | Doc Type: | Bug Fix |
| Doc Text: |
Cause: A set if MSRs used by kvmclock was deprecated in favour of a new set of registers.
Consequence: qemu-kvm didn't support the new set of registers, and guests that used only the new set wouldn't be able to use kvmclock.
Change: the new set of kvmclock registers is now supported.
Result: guests that use only the new set of kvmclock registers will be able to use kvmclock too.
|
Story Points: | --- |
| Clone Of: | 592296 | Environment: | |
| Last Closed: | 2011-12-06 15:43:09 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: | 592296 | ||
| Bug Blocks: | 580951, 743047 | ||
|
Comment 11
Qunfang Zhang
2011-09-16 07:14:20 UTC
Based on Comment 11. This issue can be reproduced on qemu-kvm-0.12.1.2-2.185.el6. Boot the same guest and check the dmesg info of guest: # dmesg | grep kvm kvm-clock: Using msrs 12 and 11 kvm-clock: cpu 0, msr 0:1c1df81, boot clock kvm-clock: cpu 0, msr 0:28215f81, primary cpu clock kvm-clock: cpu 1, msr 0:28315f81, secondary cpu clock Switching to clocksource kvm-clock It is using the old MSRs 12 and 11.
Technical note added. If any revisions are required, please edit the "Technical Notes" field
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New Contents:
Cause: A set if MSRs used by kvmclock was deprecated in favour of a new set of registers.
Consequence: qemu-kvm didn't support the new set of registers, and guests that used only the new set wouldn't be able to use kvmclock.
Change: the new set of kvmclock registers is now supported.
Result: guests that use only the new set of kvmclock registers will be able to use kvmclock too.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2011-1531.html |