>> We have seen a significant reduction in performance in our research DomU
>> OS kernel when running on Fedora 16 with Linux 3.4.2 vs. 3.3.7. We run
> a series of benchmarks which are DomU-kernel-space-CPU-heavy; many of
>> these run 10x slower when using the 3.4.2 Linux kernel as Dom0.
>> This is a little surprising---we've been tracking the Fedora kernels for
>> a long time with no problem like this. Did anyone else notice any changes?
> Just to verify.. both the 3.3.7 and 3.4.2 Linux kernel are 'release' builds? 
> and not debug-versions from rawhide? 

Yes, they are the Fedora 16 release builds.


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