From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261746AbVGEBUl (ORCPT ); Mon, 4 Jul 2005 21:20:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261742AbVGEBUl (ORCPT ); Mon, 4 Jul 2005 21:20:41 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:19124 "EHLO parcelfarce.linux.theplanet.co.uk") by vger.kernel.org with ESMTP id S261746AbVGEBUB (ORCPT ); Mon, 4 Jul 2005 21:20:01 -0400 Date: Tue, 5 Jul 2005 02:21:41 +0100 From: Matthew Wilcox To: Neil Brown Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: REGRESSION in 2.6.13-rc1: Massive slowdown with Adaptec SCSI Message-ID: <20050705012141.GB9312@parcelfarce.linux.theplanet.co.uk> References: <17097.56705.490622.759154@cse.unsw.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <17097.56705.490622.759154@cse.unsw.edu.au> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 05, 2005 at 11:08:17AM +1000, Neil Brown wrote: > On 2.6.13-rc1 the same test takes just short on 1 minute and reports > slightly less than 2 M/Second. That sounds like your drives have negotiated an asynchronous transfer agreement. Could you provide your dmesg to confirm that diagnosis? -- "Next the statesmen will invent cheap lies, putting the blame upon the nation that is attacked, and every man will be glad of those conscience-soothing falsities, and will diligently study them, and refuse to examine any refutations of them; and thus he will by and by convince himself that the war is just, and will thank God for the better sleep he enjoys after this process of grotesque self-deception." -- Mark Twain