From: Petko Manolov <petkan@varel.bg>
To: "David Mentr\\'e" <David.Mentre@irisa.fr>
Cc: linux-mm@kvack.org
Subject: Re: 4M kernel pages
Date: Mon, 16 Nov 1998 18:50:16 +0200 [thread overview]
Message-ID: <365057C8.50B31465@varel.bg> (raw)
In-Reply-To: wd8zp9rwtc7.fsf@parate.irisa.fr
David Mentr\'e wrote:
>
> Not exactly. 4MB pages for kernel are setted up _before_ the kernel is
> started.
> Look at arch/i386/kernel/head.S:
This is only for SMP machines.
> To be honest, I'm not sure that this is done here, but I'm *sure* that
> kernel uses 4Mb pages.
;-) I got sure by other way. In kernel mode i red the whole page
directory. All kernel page dir entries ended with LSB == 0xe3.
7th bit on means 4M pages. 1 and 0 bits means respectively r/w and
present.
The point is that 6th bit is also 1 when it supposed to be 0
acording to Intel docs.
Excuse me all for this boring mails!
regards
--
Petko Manolov - petkan@varel.bg
http://www.varel.bg/~petkan
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next prev parent reply other threads:[~1998-11-16 16:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-11-13 12:04 May be stupid question ;-) Petko Manolov
1998-11-13 14:12 ` Rik van Riel
1998-11-16 7:44 ` Petko Manolov
1998-11-16 8:30 ` 4M kernel pages Petko Manolov
[not found] ` <wd8emr3yfeu.fsf@parate.irisa.fr>
1998-11-16 15:06 ` Petko Manolov
1998-11-16 15:27 ` David Mentr\'e
1998-11-16 16:50 ` Petko Manolov [this message]
1998-11-16 18:18 ` David Mentr\'e
1998-11-17 9:30 ` Petko Manolov
1998-11-16 18:43 ` Rik van Riel
1998-11-17 9:34 ` Petko Manolov
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