From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752804Ab0ILLVZ (ORCPT ); Sun, 12 Sep 2010 07:21:25 -0400 Received: from lon1-post-2.mail.demon.net ([195.173.77.149]:61861 "EHLO lon1-post-2.mail.demon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752755Ab0ILLVX (ORCPT ); Sun, 12 Sep 2010 07:21:23 -0400 Subject: Re: [PATCH] libata: reorder ata_queued_cmd to remove alignment padding on 64 bit builds From: Richard Kennedy To: Hugo Antunes Cc: jgarzik , Tejun Heo , lkml , linux-ide@vger.kernel.org In-Reply-To: <4C8A3F1E.8050400@gmail.com> References: <1284117583.1903.8.camel@castor.rsk> <4C8A3F1E.8050400@gmail.com> Content-Type: text/plain; charset="UTF-8" Date: Sun, 12 Sep 2010 12:21:21 +0100 Message-ID: <1284290481.1923.14.camel@castor.rsk> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 (2.30.3-1.fc13) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2010-09-10 at 15:22 +0100, Hugo Antunes wrote: > Greetings, > > Following the list this pasts days, building a big machine with 45 > sata2 disks (WD green 1.5TB), Sil3124 4 ports sata2 with 9 port > multipliers with 5 each also from Silicom image. > > This machine should smoke but it doesn't, attached is the dmesg dump where it is possible to see the enourmous ammount > of hard and soft resets.Using Ubuntu/server 10.4 2.6.32-25-server x86_64, been questioning if this patch could > make me have better numbers from this system, going to build a debian/ubuntu kernel image with the patch, if anyone > has a link for a deb image with this patch..apreciated. > > Keep the good work > > Regards, > ./hantunes Hi, I think it's very unlikely that my patch will have any impact on your problem, it is only a very minor improvement when creating new ports. I didn't get the dmesg attachment so I can't tell what sort of problems you are having, but with that many drives I'd start by checking the power supplies & cables and then try the latest kernel. regards Richard