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Subject: Re: Disk Performance
To: andersen@codepoet.org
Date: Fri, 9 Nov 2001 23:24:01 +0000 (GMT)
Cc: riel@conectiva.com.br (Rik van Riel), ben@genesis-one.com (Ben Israel),
        linux-kernel@vger.kernel.org
In-Reply-To: <20011109155309.A14308@codepoet.org> from "Erik Andersen" at Nov 09, 2001 03:53:10 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> > # hdparm -d1 /dev/hda
> > 
> > (not enabled by default because it corrupts data with some
> > old chipsets and/or disks)
> 
> But wouldn't it make more sense to enable DMA by default, except 
> for a set of blacklisted chipsets, rather then disabling it for 
> everybody just because some older chipsets are crap?

Its a configuration option. Most vendors I know set it to enable DMA except
on blacklisted or non PCI devices
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