Messages in this thread | | | Date | Thu, 4 Jan 2007 19:02:23 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 0/33] KVM: MMU: Cache shadow page tables |
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* Avi Kivity <avi@qumranet.com> wrote:
> Andrew Morton wrote: > >Is this intended for 2.6.20, or would you prefer that we release what we > >have now and hold this off for 2.6.21? > > > > Even though these patches are potentially destabilazing, I'd like them > (and a few other patches) to go into 2.6.20: > > - kvm did not exist in 2.6.19, hence we cannot regress from that > - this patchset is the difference between a working proof of concept and > a generally usable system > - from my testing, it's quite stable
seconded - i have tested the new MMU changes quite extensively and they are converging nicely. It brings down context-switch costs by a factor of 10 and more, even for microbenchmarks: instead of throwing away the full shadow pagetable hiearchy we have worked so hard to construct this patchset allows the intelligent caching of shadow pagetables. The effect is human-visible as well - the system got visibly snappier.
(I'd increase the shadow cache pool from the current 256 pages to at least 1024 pages, but that's a detail.)
Acked-by: Ingo Molnar <mingo@elte.hu>
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