From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755816AbYAVWmq (ORCPT ); Tue, 22 Jan 2008 17:42:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751880AbYAVWmg (ORCPT ); Tue, 22 Jan 2008 17:42:36 -0500 Received: from extu-mxob-1.symantec.com ([216.10.194.28]:49581 "EHLO extu-mxob-1.symantec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751015AbYAVWme (ORCPT ); Tue, 22 Jan 2008 17:42:34 -0500 Date: Tue, 22 Jan 2008 22:41:11 +0000 (GMT) From: Hugh Dickins X-X-Sender: hugh@blonde.site To: Alan Cox cc: James Bottomley , 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 In-Reply-To: <20080122221214.1c825949@lxorguk.ukuu.org.uk> Message-ID: References: <1201022985.3210.24.camel@localhost.localdomain> <20080122221214.1c825949@lxorguk.ukuu.org.uk> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 22 Jan 2008, Alan Cox wrote: > > 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)? We moved away from that concern .... > 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 ? .... but if it's still relevant, this was with ata_piix. Hugh