From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756257AbYAVWO7 (ORCPT ); Tue, 22 Jan 2008 17:14:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752882AbYAVWOt (ORCPT ); Tue, 22 Jan 2008 17:14:49 -0500 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:58276 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750906AbYAVWOr (ORCPT ); Tue, 22 Jan 2008 17:14:47 -0500 Date: Tue, 22 Jan 2008 22:12:14 +0000 From: Alan Cox To: James Bottomley Cc: Hugh Dickins , Andrew Morton , Jeff Garzik , Alan Stern , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi Subject: Re: [PATCH rc8-mm1] hotfix libata-scsi corruption Message-ID: <20080122221214.1c825949@lxorguk.ukuu.org.uk> In-Reply-To: <1201022985.3210.24.camel@localhost.localdomain> References: <1201022985.3210.24.camel@localhost.localdomain> X-Mailer: Claws Mail 3.2.0 (GTK+ 2.12.3; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > However, I'd like to see if we can track the problem through the SG_IO > direct path ... how many adjacent page bytes are corrupt? Just a few or > a large number (I'm wondering if it's an off by one or off by alignment > type bug)? Which ATA controller is involved - in theory ATA DMA is byte aligned safe (or dword anyway) in practice I don't know if we've ever tested the non 512 byte aligned case historically for ATA just ATAPI ? Alan