RE: [Xen-devel] A question about guest_walk_tables

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

>From: Tim Deegan [mailto:Tim.Deegan@xxxxxxxxxx] 
>Sent: 2007年12月5日 18:35
>
>At 18:22 +0800 on 05 Dec (1196878922), Tian, Kevin wrote:
>> Hi, Tim,
>>      Just a curious question. Any reason why sh_page_fault can't
>> benefit vtlb_lookup to skip heavy-weight guest_walk_tables, 
>like other
>> places like sh_gva_to_gfn?
>
>For cases when we go on to make the shadow pagetables, we need the full
>walk available so we know which MFNs to shadow.
>
>I don't know whether it would be worth adding a vtlb lookup for the
>real-fault case; the fast-path code for not-present and MMIO catches a
>lot of genuine faults already.  We should definitely add the 
>walk result
>to the vTLB in any case.
>
>Thanks,
>
>Tim.
>

Understand. fast-path should be enough without vtlb help. 

Thanks,
Kevin

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