Subject: Re: Athlon SMP blues - kernels 2.4.[9 13 15-pre4]
To: pgallen@randomlogic.com (Paul G. Allen)
Date: Thu, 15 Nov 2001 10:01:56 +0000 (GMT)
Cc: alastair.stevens@mrc-bsu.cam.ac.uk (Alastair Stevens),
        linux-kernel@vger.kernel.org
In-Reply-To: <3BF31C42.469BF2B2@randomlogic.com> from "Paul G. Allen" at Nov 14, 2001 05:37:06 PM
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Message-Id: <E164JLI-0007m8-00@the-village.bc.nu>
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Sender: linux-kernel-owner@vger.kernel.org

> The only problem I still have is IDE. I can not run the IDE drive using DMA or the system will hang HARD, usually with the drive access light on. Even with DMA
> disabled it might hang under high IDE usage. I will replace the IDE drive with a SCSI drive soon as the SCSI interface works perfectly and very fast. Early MP
> chipsets had AGP and DMA hardware bugs, but according to AMD errata, the revision in my MoBo should not have these bugs (that doesn't mean it doesn't have them
> though).

The earlier MP chipsets die if you have IDE prefetching enabled (see the
errata doc). I'd be suprised if a BIOS had left that on.
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