On 03.03.2010, at 20:12, Joerg Roedel wrote: > Hi, > > here are the patches that implement nested paging support for nested > svm. They are somewhat intrusive to the soft-mmu so I post them as RFC > in the first round to get feedback about the general direction of the > changes. Nevertheless I am proud to report that with these patches the > famous kernel-compile benchmark runs only 4% slower in the l2 guest as > in the l1 guest when l2 is single-processor. With SMP guests the > situation is very different. The more vcpus the guest has the more is > the performance drop from l1 to l2. > Anyway, this post is to get feedback about the overall concept of these > patches. Please review and give feedback :-) Nice job! It's great to see you finally got around to it :-). Have you tracked what slows down SMP l2 guests yet? So far I've been assuming that IPIs just completely kill the performance, but I guess it shouldn't be that bad, especially now where you have sped up the #VMEXIT path that much. Alex-- 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
