Bug 609032
| Summary: | kvm: 9480: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Ales Kozumplik <akozumpl> | |
| Component: | qemu-kvm | Assignee: | Jes Sorensen <Jes.Sorensen> | |
| Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> | |
| Severity: | medium | Docs Contact: | ||
| Priority: | medium | |||
| Version: | 6.0 | CC: | aron.griffis, bmr, cvantuin, derek, emcnabb, eparis, gui1ty, hamiller, herrold, jpriddy, jzeleny, liko, mkenneth, nenad, ovirt-maint, psztoch, quintela, Rhev-m-bugs, syeghiay, tao, tburke, virt-maint, ykaul | |
| Target Milestone: | rc | Keywords: | Reopened | |
| Target Release: | --- | |||
| Hardware: | All | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | Doc Type: | Bug Fix | ||
| Doc Text: | Story Points: | --- | ||
| Clone Of: | 507085 | |||
| : | 816308 (view as bug list) | Environment: | ||
| Last Closed: | 2010-06-30 12:41:38 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: | 507085 | |||
| Bug Blocks: | 816308 | |||
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Comment 1
Ales Kozumplik
2010-06-29 08:58:34 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. Question, in every case when you see these error messages, is that with windows guests, or does it happen with Linux guests as well? I need to know which guest OSes show this behavior, and if you have a RHEL6 guest on one of the systems showing it, please include the output of /proc/cpuinfo from within the guest. Thanks, Jes All of the guests are rhel6: /proc/cpuinfo: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 2 model name : QEMU Virtual CPU version 0.12.1 stepping : 3 cpu MHz : 1595.715 cache size : 4096 KB fpu : yes fpu_exception : yes cpuid level : 4 wp : yes flags : fpu de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm up rep_good unfair_spinlock pni cx16 hypervisor lahf_lm bogomips : 3191.43 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: It's a 2.6.32-37.el6.x86_64 kernel. The exact dmesg output corresponding to an exactly one machine start is: kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0x0 kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0xffe7a6bd kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x530079 kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0x0 kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0xffe7a6bd kvm: 5156: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x530079 I hope that helps. Ales Per the old bug, also seeing the same on a 5.5 machine (different hardware now, though): HOST: -------------------- [jpriddy@rector ~]$ dmesg | grep unimplemented kvm: 7770: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 ... kvm: 7660: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x530079 ... kvm: 7701: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 ... kvm: 7730: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 ... kvm: 8361: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 ... kvm: 7770: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 ...etc, etc. Pattern seems to be the those lines repeating 3 times each, sometimes more. [jpriddy@rector ~]$ cat /proc/cpuinfo | grep "model name" model name : Genuine Intel(R) CPU @ 2.40GHz [jpriddy@rector ~]$ uname -r 2.6.18-194.3.1.el5 [jpriddy@rector ~]$ cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.5 (Tikanga) [jpriddy@rector ~]$ rpm -qa | grep kvm kvm-83-164.el5_5.9 etherboot-zroms-kvm-5.4.4-13.el5 kmod-kvm-83-164.el5_5.9 kvm-qemu-img-83-164.el5_5.9 -------------------- Guests on this system are mostly RHEL5.5 (6 vms total) all are RHEL, but no RHEL6. GUEST: -------------------- [jpriddy@sat01 ~]$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 6 model name : QEMU Virtual CPU version 0.9.1 stepping : 3 cpu MHz : 2393.888 cache size : 32 KB fpu : yes fpu_exception : yes cpuid level : 4 wp : yes flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx lm up pni bogomips : 4787.77 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: -------------------- I can stand up a RHEL6 guest on this if that helps. If it helps... just confirmed, *all* vm systems on this host are at least RHEL5.5. Ok, did a bit more checking of this. From the adds above: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 6 All the instances of writes to MSR 0xc1 and 0x186 as the ones you report are done in the guest kernel via native_write_msr_safe() which is a safe function for probing. Note that with cpu_family 6 which is P6, PMU support is not specified via CPUID leaf 0xa, so the kernel has to probe for it, which is what you are seeing. This is harmless and expected behaviour. Closing Jes *** Bug 812413 has been marked as a duplicate of this bug. *** |