Messages in this thread | | | Date | Tue, 21 Jun 2011 17:46:08 -0700 | From | Chris Wright <> | Subject | Re: [PATCH 0/2 V2] ksm: take dirty bit as reference to avoid volatile pages scanning |
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* Nai Xia (nai.xia@gmail.com) 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?
thanks, -chris
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