From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Burger-Scheidlin Subject: Re: ide dma bug? Date: Mon, 5 Sep 2005 12:39:14 +0100 Message-ID: <200509051239.14713.andersin@freenet.de> References: <20050904201844.GA12464@pog.tecnopolis.ca> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from hermes.iu-bremen.de ([212.201.44.23]:64395 "EHLO hermes.iu-bremen.de") by vger.kernel.org with ESMTP id S1750771AbVIELji (ORCPT ); Mon, 5 Sep 2005 07:39:38 -0400 Received: from localhost (demetrius.iu-bremen.de [212.201.44.32]) by hermes.iu-bremen.de (Postfix) with ESMTP id 27F52393B2 for ; Mon, 5 Sep 2005 13:39:26 +0200 (CEST) Received: from hermes.iu-bremen.de ([212.201.44.23]) by localhost (demetrius [212.201.44.32]) (amavisd-new, port 10024) with ESMTP id 06023-01 for ; Mon, 5 Sep 2005 13:39:25 +0200 (CEST) Received: from helena.world.iu-bremen.de (mailhost.world.iu-bremen.de [212.201.44.34]) by hermes.iu-bremen.de (Postfix) with ESMTP id F12D639182 for ; Mon, 5 Sep 2005 13:39:24 +0200 (CEST) Received: from phoenix.burgerhome.de (p54861D46.dip0.t-ipconnect.de [84.134.29.70]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by helena.world.iu-bremen.de (Postfix) with ESMTP id AEEAA1EE0F for ; Mon, 5 Sep 2005 13:39:24 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by phoenix.burgerhome.de (Postfix) with ESMTP id D4D257ECB60 for ; Mon, 5 Sep 2005 13:33:05 +0200 (CEST) Received: from phoenix.burgerhome.de ([127.0.0.1]) by localhost (phoenix [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 17806-10 for ; Mon, 5 Sep 2005 13:33:02 +0200 (CEST) Received: from localhost (router.burgerhome.de [192.168.0.1]) by phoenix.burgerhome.de (Postfix) with ESMTP id 988307ECB3C for ; Mon, 5 Sep 2005 13:33:02 +0200 (CEST) In-Reply-To: <20050904201844.GA12464@pog.tecnopolis.ca> Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org On Sunday 04 September 2005 21:18, Trevor Cordes wrote: > I'm getting a couple of times every couple of days: > > Sep 1 07:09:53 piles kernel: hdq: dma_intr: bad DMA status (dma_stat=75) > Sep 1 07:09:53 piles kernel: hdq: dma_intr: status=0x50 { DriveReady > SeekComplete } Sep 1 07:09:53 piles kernel: ide: failed opcode was: > unknown > > They're running off of the onboard Intel 845D IDE, onboard Promise PDC20276 > [...] 2 CMD680-based cards. [...] The 8 250's are all IDE masters. The 4 > 160's share 2 IDE channels (master+slave). I had a similar problem with a SiI680 (and since lspci states that Silicon Image was formerly CMD Tech. I thought it might be related). In my case, I got lost interrupts and dma errors when I used both channels of the SiI680 simultaneously. I serialized both channels (kernel parameters ide2=serialize ide3=serialize) and the problems went away (I am not sure though how much of a performance impact it has). If you want more detailed info on my scenario to compare it to yours, please check bug 5145: http://bugzilla.kernel.org/show_bug.cgi?id=5145 . Christoph Burger-Scheidlin