Re: page fault scalability patch V12 [0/7]: Overview and performance

Nick Piggin
2004-12-10T05:19:56Z

Benjamin Herrenschmidt wrote:
> On Fri, 2004-12-10 at 15:54 +1100, Nick Piggin wrote:
>
>>Nick Piggin wrote:
>>
>>The page-freed-before-update_mmu_cache issue can be solved in that way,
>>not the set_pte and update_mmu_cache not performed under the same ptl
>>section issue that you raised.
>
>
> What is the problem with update_mmu_cache ? It doesn't need to be done
> in the same lock section since it's approx. equivalent to a HW fault,
> which doesn't take the ptl...
>

I don't think a problem has been observed, I think Hugh was just raising
it as a general issue.