From: Dave Jones <davej@codemonkey.org.uk>
To: Jamie Lokier <jamie@shareable.org>
Cc: Gerd Knorr <kraxel@suse.de>,
Linus Torvalds <torvalds@transmeta.com>,
Kernel List <linux-kernel@vger.kernel.org>,
Andi Kleen <ak@suse.de>
Subject: Re: [patch] vesafb fix
Date: Tue, 15 Jul 2003 18:53:58 +0100 [thread overview]
Message-ID: <20030715175358.GB15505@suse.de> (raw)
In-Reply-To: <20030715173557.GB1491@mail.jlokier.co.uk>
On Tue, Jul 15, 2003 at 06:35:57PM +0100, Jamie Lokier wrote:
> There used to be a vesafb problem with MTRRs when the framebuffer had
> an odd size: 2.5MB of RAM (my laptop has this).
>
> It would create an MTRR for the first 0.5MB of the framebuffer, and
> then try to create another for the subsequent 2MB.
>
> The latter failed because it's not suitably aligned - i.e. there was a
> problem in th logic which splits non-power-of-two regions.
> Is that fixed these days?
Better would be to use change_page_attr to manipulate PAT bits.
We then wouldn't have to worry at all about alignment, running out
of MTRRs, or collisions with other MTRRs.
Dave
next prev parent reply other threads:[~2003-07-15 17:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-15 14:10 [patch] vesafb fix Gerd Knorr
2003-07-15 17:35 ` Jamie Lokier
2003-07-15 17:53 ` Dave Jones [this message]
2003-07-15 18:06 ` Alan Cox
2003-07-15 18:22 ` Dave Jones
2003-07-15 18:46 ` Alan Cox
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