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Date: Wed, 4 Sep 2002 11:49:45 -0400
From: Benjamin LaHaise <bcrl@redhat.com>
To: "Joseph N. Hall" <joseph@5sigma.com>
Cc: Matthew Dharm <mdharm-kernel@one-eyed-alien.net>,
       linux-kernel@vger.kernel.org
Subject: Re: IDE-DVD problems [excuse former idiotic topic]
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On Wed, Sep 04, 2002 at 08:48:00AM -0700, Joseph N. Hall wrote:
> * Performance is terrible
> * booting with noapic makes no difference
> * Performance seems to indicate some kind of difficulties in
>   the kernel, perhaps connected to interrupt handling

That's what happens when DMA isn't being used: the kernel spends lots of 
time copying data from the drive in the interrupt handler and not allowing 
userspace to execute.

		-ben
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