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SubjectRe: [PATCH 5/6] KVM: MMU: prefetch ptes when intercepted guest #PF
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.

Perhaps we need to integrate it into walk_addr, there's no reason to
read the gptes twice.


--
error compiling committee.c: too many arguments to function



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