From: Brian Gerst <bgerst@didntduck.org>
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?
Date: Fri, 18 Jan 2002 16:14:01 -0500 [thread overview]
Message-ID: <3C489019.3422D650@didntduck.org> (raw)
In-Reply-To: <E16RgGu-0005tD-00@DervishD.viadomus.com>
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:)))
>
> Raúl
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
next prev parent reply other threads:[~2002-01-18 21:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-18 21:10 Is there anyway to use 4M pages on x86 linux in user level? DervishD
2002-01-18 21:14 ` Brian Gerst [this message]
2002-01-18 21:37 ` Richard B. Johnson
-- strict thread matches above, loose matches on Subject: below --
2002-01-18 23:18 DervishD
2002-01-18 12:31 DervishD
2002-01-18 13:46 ` Brian Gerst
2002-01-17 17:18 Yinlei Yu
2002-01-17 17:48 ` Rik van Riel
2002-01-18 7:23 ` Jeremy Jackson
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