From: Val Henson <val@nmt.edu>
To: "Albert D. Cahalan" <acahalan@cs.uml.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Athlon/AGP issue update
Date: Fri, 25 Jan 2002 11:17:31 -0700 [thread overview]
Message-ID: <20020125111731.B26874@boardwalk> (raw)
In-Reply-To: <20020123171419.29358@mailhost.mipsys.com> <200201232314.g0NNEXe457847@saturn.cs.uml.edu>
In-Reply-To: <200201232314.g0NNEXe457847@saturn.cs.uml.edu>; from acahalan@cs.uml.edu on Wed, Jan 23, 2002 at 06:14:33PM -0500
On Wed, Jan 23, 2002 at 06:14:33PM -0500, Albert D. Cahalan wrote:
>
> It's a waste to use BAT mappings for the kernel anyway, because
> we try to keep the huge computations and graphics in userspace.
> With page tables under BAT mappings, privileged user code could
> be allowed to steal BAT registers for locked memory or IO memory.
The rationale behind BAT mapping the kernel is that the kernel does not
use any TLB entries, leaving them all for user processes. (As long as
we have < 512MB RAM.)
-VAL
next prev parent reply other threads:[~2002-01-25 18:18 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-23 9:52 Athlon/AGP issue update Daniel Robbins
2002-01-23 10:18 ` David S. Miller
2002-01-23 2:46 ` benh
2002-01-23 14:08 ` David S. Miller
2002-01-23 15:47 ` benh
2002-01-25 18:34 ` Val Henson
2002-01-26 0:20 ` Benjamin Herrenschmidt
2002-01-27 19:22 ` Val Henson
2002-01-27 19:32 ` Benjamin Herrenschmidt
2002-01-23 16:31 ` Albert D. Cahalan
2002-01-23 16:57 ` Daniel Robbins
2002-01-23 17:14 ` benh
2002-01-23 23:14 ` Albert D. Cahalan
2002-01-25 18:17 ` Val Henson [this message]
2002-01-23 19:20 ` Oliver Neukum
[not found] ` <200201231010.g0NAAuE05886@Port.imtp.ilyichevsk.odessa.ua>
2002-01-23 10:24 ` David S. Miller
2002-01-23 10:31 ` Rik van Riel
2002-01-23 11:39 ` David S. Miller
2002-01-23 11:39 ` William Lee Irwin III
2002-01-23 11:47 ` David S. Miller
2002-01-23 17:09 ` Albert D. Cahalan
2002-01-23 18:38 ` David S. Miller
-- strict thread matches above, loose matches on Subject: below --
2002-01-23 10:38 Studierende der Universitaet des Saarlandes
2002-01-23 11:44 ` David S. Miller
2002-01-23 12:32 ` Momchil Velikov
2002-01-23 12:34 ` David S. Miller
2002-01-23 12:41 ` Momchil Velikov
2002-01-23 14:50 ` Manfred Spraul
2002-01-23 11:44 ` David Woodhouse
2002-01-23 11:49 ` David S. Miller
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