Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754242AbXHKFWY (ORCPT ); Sat, 11 Aug 2007 01:22:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751363AbXHKFWP (ORCPT ); Sat, 11 Aug 2007 01:22:15 -0400 Received: from turing-police.cc.vt.edu ([128.173.14.107]:44969 "EHLO turing-police.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751021AbXHKFWO (ORCPT ); Sat, 11 Aug 2007 01:22:14 -0400 X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.2 To: Bill Davidsen Cc: david@lang.hm, Diego Calleja , Ingo Molnar , Alan Cox , J??rn Engel , Jeff Garzik , Linus Torvalds , Peter Zijlstra , linux-mm@kvack.org, Linux Kernel Mailing List , miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com, richard@rsk.demon.co.uk Subject: Re: [PATCH 00/23] per device dirty throttling -v8 In-Reply-To: Your message of "Fri, 10 Aug 2007 00:04:45 EDT." <46BBE3DD.2090209@tmr.com> From: Valdis.Kletnieks@vt.edu References: <20070804103347.GA1956@elte.hu> <20070804163733.GA31001@elte.hu> <46B4C0A8.1000902@garzik.org> <20070804191205.GA24723@lazybastard.org> <20070804192130.GA25346@elte.hu> <20070804211156.5f600d80@the-village.bc.nu> <20070804202830.GA4538@elte.hu> <20070804224834.5187f9b7@the-village.bc.nu> <20070805071320.GC515@elte.hu> <20070805152231.aba9428a.diegocg@gmail.com> <46BBE3DD.2090209@tmr.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1186809557_3018P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Sat, 11 Aug 2007 01:19:17 -0400 Message-ID: <10215.1186809557@turing-police.cc.vt.edu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1381 Lines: 43 --==_Exmh_1186809557_3018P Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable On Fri, 10 Aug 2007 00:04:45 EDT, Bill Davidsen said: > > I never imagined that itwas the 20%+ hit that is being described, and= =20 > > with so little impact, or I would have switched to it across the boar= d=20 > > years ago. > >=20 > To get that magnitude you need slow disk with very fast CPU. It helps=20 > most of systems where the disk hardware is marginal or worse for the i/= o=20 > load. Don't take that as typical. I suspect that almost every single laptop with a Core2 Duo in it falls in= to that classification, and it's getting worse every year, as we see more disparity between CPU speeds (increasing) and disk seek times (basically = nailed to the floor for the last decade). --==_Exmh_1186809557_3018P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFGvUbVcC3lWbTT17ARAuPXAJ9SqM6bwtjumsVtyAuumj927ov+KgCeO7v9 zXyrLmOV51EQiA3Js4pUJ1k= =wgKI -----END PGP SIGNATURE----- --==_Exmh_1186809557_3018P-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/