From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263669AbTDNSSa (for ); Mon, 14 Apr 2003 14:18:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263638AbTDNSSa (for ); Mon, 14 Apr 2003 14:18:30 -0400 Received: from pixpat.austin.ibm.com ([192.35.232.241]:53908 "EHLO arlx248.austin.ibm.com") by vger.kernel.org with ESMTP id S263669AbTDNSSX (for ); Mon, 14 Apr 2003 14:18:23 -0400 Subject: Re: Benefits from computing physical IDE disk geometry? From: Wes Felter To: Timothy Miller Cc: linux-kernel@vger.kernel.org In-Reply-To: <001301c30145$5ff85fb0$6801a8c0@epimetheus> References: <001301c30145$5ff85fb0$6801a8c0@epimetheus> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Hack the Planet Message-Id: <1050344844.1156.8.camel@arlx248.austin.ibm.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 14 Apr 2003 13:27:25 -0500 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2003-04-12 at 17:46, Timothy Miller wrote: > So, what if one were to write a program which would perform a bunch of > seek-time tests to estimate an IDE disk's physical geometry? It could then > make that information available to the kernel to use to reorder accesses > more optimally. Greg Ganger et al. have done some recent work in this area: http://www.pdl.cmu.edu/PDL-FTP/stray/freeblocks_abs.html http://www.pdl.cmu.edu/PDL-FTP/stray/traxtent_abs.html -- Wes Felter - wesley@felter.org - http://felter.org/wesley/