Messages in this thread | | | Date | Thu, 17 Jun 2010 17:29:02 +0800 | From | Xiao Guangrong <> | Subject | Re: [PATCH 5/6] KVM: MMU: prefetch ptes when intercepted guest #PF |
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Avi Kivity wrote: > On 06/17/2010 12:04 PM, Xiao Guangrong wrote: >> >> >>> So we can change the fault path to always fault 16 ptes, aligned on 16 >>> pte boundary, with the needed pte called with specualtive=false. >>> >> Avi, i not understand it clearly, Could you please explain it? :-( >> > > Right now if the fault is in spte i, you prefetch ptes > (i+1)..(i+MAX_PREFETCH-1). I'd like to prefetch ptes (i & > ~(MAX_PREFETCH-1))..(i | (MAX_PREFETCH - 1)). Read all those gptes, and > map them one by one with speculative = false only for spte i. >
Thanks for your explanation, i see.
> Perhaps we need to integrate it into walk_addr, there's no reason to > read the gptes twice. >
OK, will do it.
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