On Wednesday 22 June 2011 08:46:08 you wrote: > * Nai Xia (nai.xia@xxxxxxxxx) wrote: > > Compared to the first version, this patch set addresses the problem of > > dirty bit updating of virtual machines, by adding two mmu_notifier interfaces. > > So it can now track the volatile working set inside KVM guest OS. > > > > V1 log: > > Currently, ksm uses page checksum to detect volatile pages. Izik Eidus > > suggested that we could use pte dirty bit to optimize. This patch series > > adds this new logic. > > > > Preliminary benchmarks show that the scan speed is improved by up to 16 > > times on volatile transparent huge pages and up to 8 times on volatile > > regular pages. > > Did you run this only in the host (which would not trigger the notifiers > to kvm), or also run your test program in a guest? Yeah, I did run the test program in guest but I mean the top speed is measured in host. i.e. I do confirm the ksmd can skip the pages of this test in guest OS but did not measure the speed up on guest. Thanks, Nai > > thanks, > -chris > -- 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>