Re: i386 and PAE: pud_present()
- From: Andi Kleen <ak@xxxxxxx>
- Date: Sun, 30 Apr 2006 10:53:26 +0200
On Sunday 30 April 2006 08:07, Dave McCracken wrote:
--On Friday, April 28, 2006 10:27:21 +0200 Andi Kleen <ak@xxxxxxx> wrote:
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.
The PGD is always fully populated on i386 if PAE is enabled. All three of
the pmd pages are allocated at page table creation time and persist till
the page table is deleted.
At least with the new flexmmap it sounds like a waste of memory.
-Andi
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