On Fri, 20 Apr 2012 16:07:41 -0700 Ying Han <yinghan@xxxxxxxxxx> wrote: > My understanding of the real pain is the poor implementation of the > mmu_shrinker. It iterates all the registered mmu_shrink callbacks for > each kvm and only does little work at a time while holding two big > locks. I learned from mikew@ (also ++cc-ed) that is causing latency > spikes and unfairness among kvm instance in some of the experiment > we've seen. Last year, I discussed the mmu_shrink issues on kvm ML: [PATCH 0/4] KVM: Make mmu_shrink() scan nr_to_scan shadow pages http://www.spinics.net/lists/kvm/msg65231.html Sadly, we could not find any good way at that time. Thanks, Takuya -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>