From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Re: [git patches] libata updates Date: Tue, 1 May 2007 14:38:07 -0700 Message-ID: <200705011438.07499.jesse.barnes@intel.com> References: <20070429161542.GA12501@havoc.gtf.org> <46364C04.4050208@garzik.org> <46364FFA.9050500@seclark.us> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from mga03.intel.com ([143.182.124.21]:32282 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423690AbXEAVh5 (ORCPT ); Tue, 1 May 2007 17:37:57 -0400 In-Reply-To: <46364FFA.9050500@seclark.us> Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Stephen.Clark@seclark.us Cc: Jeff Garzik , Chuck Ebbert , linux-ide@vger.kernel.org, LKML On Monday, April 30, 2007 1:22 pm Stephen Clark wrote: > Please don't do this! > > Yeah the kernel will boot but the hd performance is sh*t on my > laptop. I am running FC6 with > kernel 2.6.21 and without the combined_mode setting my disk > performance goes down to a > whopping 1.25mb/sec from 44mb/sec when I boot with > combined_mode=libata. It make my > system unusable! So your performance is good when you add combined_mode=libata? I hope so, because that's why I added it in the first place... However, Jeff's patch won't steal your performance as long as you make sure you use the libata based drivers for everything. If you're running Fedora I think the rawhide kernels are configured this way, but the fc6 era kernels aren't. Jesse