From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264307AbUGAIbt (ORCPT ); Thu, 1 Jul 2004 04:31:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264299AbUGAIbs (ORCPT ); Thu, 1 Jul 2004 04:31:48 -0400 Received: from hermes.domdv.de ([193.102.202.1]:15365 "EHLO hermes.domdv.de") by vger.kernel.org with ESMTP id S264307AbUGAIbj (ORCPT ); Thu, 1 Jul 2004 04:31:39 -0400 Message-ID: <40E3CBE8.7060400@domdv.de> Date: Thu, 01 Jul 2004 10:31:36 +0200 From: Andreas Steinmetz User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040311 X-Accept-Language: en-us, en, de MIME-Version: 1.0 To: Dan Hollis CC: linux-kernel@vger.kernel.org Subject: Re: kernel 2.6.6 amd8111 apic bugs References: In-Reply-To: X-Enigmail-Version: 0.83.3.0 X-Enigmail-Supports: pgp-inline, pgp-mime 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 Dan Hollis wrote: >>>>There seem to be regular dma timeouts: >>>>hdc: dma_timer_expiry: dma status == 0x24 >>>>hdc: DMA interrupt recovery >>>>hdc: lost interrupt >>>>hda: dma_timer_expiry: dma status == 0x24 >>>>hda: DMA interrupt recovery >>>>hda: lost interrupt >>>>Hardware: >>>>Opteron 140, Tyan Tomcat K8S (S2850) >>> >>>Try disabling ACPI (in .config or boot acpi=off iirc) >> >>I had that problem, but not with ACPI, only when I forced APIC on. It >>was on the VIA controller which uses the same driver. > > > Turns out it was apic and not acpi at all. Booting with ACPI but noapic > and I no longer get any dma errors. > > Is the bug in the linux apic code or a hardware flaw in the opteron cpu? > Or something else? > From the X86-64 patch release notes of Andi Kleen: Reports that dual Tyan S2885 and S2880 can lock up when multiple IDE channels are stressed in parallel. "noapic" or "ideX=serialize" seems to work around it. Andre Hedrick thinks it's a generic bug/race in the IDE code. Looks like you have a similar problem on a UP board. -- Andreas Steinmetz SPAMmers use robotrap@domdv.de