From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753807AbXEaOpo (ORCPT ); Thu, 31 May 2007 10:45:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752567AbXEaOpg (ORCPT ); Thu, 31 May 2007 10:45:36 -0400 Received: from tuxrocks.com ([63.99.9.217]:38947 "EHLO tuxrocks.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752459AbXEaOpf (ORCPT ); Thu, 31 May 2007 10:45:35 -0400 Message-ID: <465EDF89.9050207@tuxrocks.com> Date: Thu, 31 May 2007 09:45:29 -0500 From: Frank Sorenson User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: LKML , jeff@garzik.org Subject: Combined mode quirk removal kills performance X-Enigmail-Version: 0.94.3.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The patch to "remove combined mode quirk" (git bisect says 8cdfb29c0cd8018f92214c11c631d8926f4cb032) makes my laptop run slower than a dead sloth. "hdparm -T" indicates that buffered disk reads on my hard drive drop from 48-50 MB/sec to 1-2MB/sec, and the system is nearly unusable. System is a Dell Inspiron E1705 (Core 2 Duo 2.16GHz) running x86_64 FC6. Frank - -- Frank Sorenson - KD7TZK Linux Systems Engineer, DSS Engineering, UBS AG frank@tuxrocks.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFGXt+JaI0dwg4A47wRAqJmAJ4k4E9ekkitOdQ72HUXbky11nD1cACghGu6 y7Y71PPaKHYcQhYSfL55bNk= =MPYY -----END PGP SIGNATURE-----