Bug 798936
| Summary: | enable architectural PMU cpuid leaf for kvm | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Gleb Natapov <gleb> |
| Component: | qemu-kvm | Assignee: | Gleb Natapov <gleb> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.3 | CC: | acathrow, areis, bsarathy, juzhang, knoel, michen, minovotn, mkenneth, shuang, virt-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-0.12.1.2-2.244.el6 | Doc Type: | Bug Fix |
| Doc Text: |
Cause
Running qemu with -cpu host does not expose emulated PMU to a guest.
Consequence
Guest cannot use PMU counters.
Fix
If host kernel support PMU emulation expose cpuid.0AH leaf to a guest.
Result
Guest can use PMU counters to profile itself
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-06-20 11:44:08 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
Gleb Natapov
2012-03-01 10:37:41 UTC
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
New Contents:
NEEDINFO
Technical note updated. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
Diffed Contents:
@@ -1 +1,11 @@
-NEEDINFO+Cause
+ Running qemu with -cpu host does not expose emulated PMU to a guest.
+
+Consequence
+ Guest cannot use PMU counters.
+
+Fix
+ If host kernel support PMU emulation expose cpuid.0AH leaf to a guest.
+
+Result
+ Guest can use PMU counters to profile itself
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/RHBA-2012-0746.html |