On Tue, 2012-05-01 at 15:12 +0300, Avi Kivity wrote: > We're now moving the freeing of kvm shadow page tables from using rcu to > using an irq-protected scheme like gup_fast(), because of the > performance differences. We didn't track it down but I expect the cause > is less reuse of cache-hot pages. It would be good to understand these things.. just doing things because tends to come back and bite you :-) If its cache behaviour you should be able to clearly see that using perf stat. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
