From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 26 Sep 2002 12:03:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 26 Sep 2002 12:03:26 -0400 Received: from dbl.q-ag.de ([80.146.160.66]:12181 "EHLO dbl.q-ag.de") by vger.kernel.org with ESMTP id ; Thu, 26 Sep 2002 12:03:05 -0400 Message-ID: <3D9330ED.4080105@colorfullife.com> Date: Thu, 26 Sep 2002 18:08:13 +0200 From: Manfred Spraul User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 4.0) X-Accept-Language: en, de MIME-Version: 1.0 To: Dave Jones CC: linux-kernel@vger.kernel.org, Jan Kasprzak , Alan Cox Subject: Re: AMD 768 erratum 10 (solved: AMD 760MPX DMA lockup) Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org The errata is not PS/2 mouse specific: it says that the io apic doesn't implement masking interrupts correctly. Linux uses masking aggressively - disable_irq() is implemented by masking the interrupt in the io apic. I'm surprised that this doesn't cause frequent problems. Perhaps the problem only occurs if an invalid cpu id is written into the target register, as done by Netware? Is someone around with a ne2k-pci card and a AMD-760MPX based system? Regarding Jan's problem: I'm not sure if his problems are related to this errata. It says that using a PS/2 mouse instead of a serial mouse with Novell Netward avoids the hang during shutdown, probably because then netware doesn't mask the irq. -- Manfred