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

[Nick Piggin]

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.
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