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Date: Fri, 18 Jan 2002 16:14:01 -0500
From: Brian Gerst <bgerst@didntduck.org>
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To: DervishD <raul@viadomus.com>
CC: linux-kernel@vger.kernel.org, yinlei_yu@hotmail.com
Subject: Re: Is there anyway to use 4M pages on x86 linux in user level?
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DervishD wrote:
> 
>     Hi Brian :)
> 
> >The large page size is 4MB, except in PAE mode where they are 2MB.
> >Normal pages are always 4KB.  Noting in the GDT affects the page
> >size.
> 
>     The entries in the GDT, do not set the page size for that
> descriptor? I'm certainly rusted on the i386 O:)))
> 
>     Ra?l

No, there is a bit in the page directory that determines if the entry
points to a page table (with 4KB pages) or to a 4MB page.  The GDT is
only used for segmentation, which is totally seperate from paging.

--

				Brian Gerst
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