[ kvm-Bugs-2721640 ] perfctr wrmsr warning when booting 64bit RHEl5.3

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Bugs item #2721640, was opened at 2009-03-29 19:04
Message generated for change (Tracker Item Submitted) made by jiajun
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2721640&group_id=180599

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Category: intel
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jiajun Xu (jiajun)
Assigned to: Nobody/Anonymous (nobody)
Summary: perfctr wrmsr warning when booting 64bit RHEl5.3

Initial Comment:
Testing Environment
Kernel Commit: 1b24f5558e2b1dc20de2e974e80785a4e231c133
Userspace Commit: ef44113201a240fae7faf480591a9ecd73d337d1
Host Kernel Version: 2.6.29-rc6

When booting 64bit RHEL5.3 guest, there are some perfctr wrmsr warnings printing in dmesg. With 32bit RHEl5.3 or other older 64bit kernel, there is no such warning.

Reproduce steps:
----------------
qemu-system-x86_64  -m 768   -net nic,macaddr=00:16:3e:0a:52:36,model=rtl8139 -net tap,script=/etc/kvm/qemu-ifup
-hda /share/xvs/var/32e_rhel5u3.img

dmesg log 

device sw3 entered promiscuous mode
kvm: 20076: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079
kvm: 20076: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0xffcf2a11
kvm: 20076: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x530079





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