From: Dave McCracken <dmccr@us.ibm.com>
To: Andi Kleen <ak@suse.de>, Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Magnus Damm <magnus.damm@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Memory Management <linux-mm@kvack.org>
Subject: Re: i386 and PAE: pud_present()
Date: Sun, 30 Apr 2006 01:07:15 -0500 [thread overview]
Message-ID: <2432524299CCD3CA89BB647D@[10.1.1.4]> (raw)
In-Reply-To: <200604281027.22183.ak@suse.de>
--On Friday, April 28, 2006 10:27:21 +0200 Andi Kleen <ak@suse.de> 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.
Dave McCracken
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next prev parent reply other threads:[~2006-04-30 6:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-28 7:40 Magnus Damm
2006-04-28 7:54 ` Nick Piggin
2006-04-28 8:27 ` Andi Kleen
2006-04-30 6:07 ` Dave McCracken [this message]
2006-04-30 8:53 ` Andi Kleen
[not found] ` <2432524299CCD3CA89BB647D@10.1.1.4>
2006-05-01 3:07 ` Magnus Damm
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