Xen users - Jun 2009 - cannot use DVFS in xen 3.4, suggested way of adding cpufreq=dom0-kernel has been tried

Hello,

I want to use DVFS in xen. I use Fedora 8. The server supports DVFS when it
boots from Fedora 8 without xen. Then, I installed Xen 3.4 from source and
boots successfully. But the cpufreq directory is gone in the system. I
cannnot use DVFS. If I run xenpm get-cpufreq-xxx, it always reports "failed
to get xxx". I have googled a lot, but still cannot find the solution. The
CPU is  Intel(R) Core(TM)2 CPU  6300  @ 1.86GHz. I also tried to add
cpufreq=xen or cpufreq=dom0-kernel, but neither of them works.
Could anybody give me some guidance? Thanks.


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