From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 21 Aug 2001 18:49:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 21 Aug 2001 18:49:20 -0400 Received: from abasin.nj.nec.com ([138.15.150.16]:49418 "HELO abasin.nj.nec.com") by vger.kernel.org with SMTP id ; Tue, 21 Aug 2001 18:49:09 -0400 From: Sven Heinicke MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15234.58734.200740.952923@abasin.nj.nec.com> Date: Tue, 21 Aug 2001 18:49:18 -0400 (EDT) To: "Justin T. Gibbs" Cc: Daniel Phillips , linux-kernel@vger.kernel.org Subject: Re: With Daniel Phillips Patch (was: aic7xxx with 2.4.9 on 7899P) In-Reply-To: <200108211719.f7LHIvY95432@aslan.scsiguy.com> In-Reply-To: <15234.37073.974320.621770@abasin.nj.nec.com> <200108211719.f7LHIvY95432@aslan.scsiguy.com> X-Mailer: VM 6.72 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Justin, I've tried removing your check, for writing bonnie++ still reports slower write times then IDE drive on the other system. Daniel Phillips was great at helping me notice a problem that was causing slow down but not related to the aic7xxx driver, thus I am now trying the 7.4.8-ac8 kernel. I made your change whe will get try to get my user to test the system with and without your change. Sven Justin T. Gibbs writes: > >Disk access is faster then before but still slower then the IDE > >drive. Any ideas? > > It could be the occasionall ordered tag that is sent to the drive to > prevent tag starvation. If you search in drivers/scsi/aic7xxx/aic7xxx_linux.c > for "OTAG_THRESH" and make that if test always fail (add an "&& 0") you will > have effectively disabled this feature. I should probably make it an option > that defaults to off. > > -- > Justin