Re: i386 and PAE: pud_present()

[Andi Kleen]

On Friday 28 April 2006 09:54, Nick Piggin wrote:
> Magnus Damm wrote:
> > Hi guys,
> > 
> > In file include/asm-i386/pgtable-3level.h:
> > 
> > On i386 with PAE enabled, shouldn't pud_present() return (pud_val(pud)
> > & _PAGE_PRESENT) instead of constant 1?
> > 
> > Today pud_present() returns constant 1 regardless of PAE or not. This
> > looks wrong to me, but maybe I'm misunderstanding how to fold the page
> > tables... =)
> 
> Take a look a little further down the page for the comment.
> 
> In i386 + PAE, pud is always present.

I think his problem is that the PGD is always present too (in pgtables-nopud.h)
Indeed looks strange.

-Andi
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