Subject: Re: port-i386/9090: Generic i386 kernel uses DMA modes for ATA/IDE disks
To: None <email@example.com>
From: Matthias Scheler <firstname.lastname@example.org>
Date: 01/03/2000 06:32:44
In article <199912312113.NAA01197@nbwww.isc.org>,
> The generic and install kernels for i386 should have DMA modes
> disabled for ATA/IDE disks.
Disabling DMA support in GENERIC is a very, very bad idea. This will result
in performance loss for lots of people just because of a few broken
motherboads. Even worse, some people will believe that NetBSD doesn't
support IDE DMA at all and will switch to another operating system.
The only reasonable sollution is to add a quirk table and disable DMA
for the chipset on your particular motherboard by default.
Matthias Scheler http://www.sighardstrasse.de/~tron/