Marcelo Tosatti wrote:
>>>>
>>>> It reads the 16 aligned items around sptep's corresponding gpte and this
>>>> gpte
>>>> is also in this area. :-)
>>> But you removed that in patch 8?
>>>
>> Oh, i just want it good for review, you mean it's better let patch 7 and 8
>> in one patch?
>
> I mean patch 7 is wrong because it removes rereading of gpte, with
> mmu_lock held, in the prefetch patch.
>
Marcelo,
Sorry, i don't understand it clearly.
In the patch 7, we read gpte like this:
hold mmu_lock
atomic read gpte during guest mapping's checking in 'fetch' path
atomic read 16 aligned items chunk (include gpte) in pte_prefetch path
release mmu_lock
And in the patch 8, we do it like this:
hold mmu_lock
atomic read 16 aligned items chunk (include gpte) in 'fetch' path, and
saved this chunk to gw->prefetch_ptes
get gptes form gw->prefetch_ptes in pte_prefetch path
release mmu_lock
Could you please tell me where is wrong?
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