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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: MediaGX/Geode performance fix, Was: Which processor/board for embedded NTP
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From: Christer Weinigel <christer@weinigel.se>
Organization: Weinigel Ingenjorsbyra AB
Date: 20 Sep 2002 11:59:42 +0200
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Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> On Thu, 2002-09-19 at 20:39, Christer Weinigel wrote:
> > This mail contains a patch to fix a performance problem with many
> > Cyrix MediaGX/NatSemi Geode platforms.  The register settings have
> > been officially recommended by NatSemi themselves.  The patch is
> > against linux-2.4.20-pre7.  Should this be merged into the mainsteam
> > linux kernel?
> 
> This wont actually make an iota of difference in most cases. The CS5530
> IDE driver will force this value to 0x14 anyway. It also sets MWI on te
> X-bus which is needed too.

Ok, it did make a 5% difference when I did some quick tests on TCP
performance.  But I didn't have the CS5530 IDE driver loaded.

> Probably the fixup should be done in the PCI quirks.

Sounds it should be moved from the IDE driver to quirks at least, but
that might be a 2.5 thing in that case.

  /Christer

-- 
"Just how much can I get away with and still go to heaven?"

Freelance consultant specializing in device driver programming for Linux 
Christer Weinigel <christer@weinigel.se>  http://www.weinigel.se
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