From owner-freebsd-current Mon Sep 14 18:57:02 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA08711 for freebsd-current-outgoing; Mon, 14 Sep 1998 18:57:02 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from smtp04.primenet.com (smtp04.primenet.com [206.165.6.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id SAA08705; Mon, 14 Sep 1998 18:56:49 -0700 (PDT) (envelope-from tlambert@usr05.primenet.com) Received: (from daemon@localhost) by smtp04.primenet.com (8.8.8/8.8.8) id SAA25541; Mon, 14 Sep 1998 18:56:33 -0700 (MST) Received: from usr05.primenet.com(206.165.6.205) via SMTP by smtp04.primenet.com, id smtpd025481; Mon Sep 14 18:56:24 1998 Received: (from tlambert@localhost) by usr05.primenet.com (8.8.5/8.8.5) id SAA12652; Mon, 14 Sep 1998 18:56:16 -0700 (MST) From: Terry Lambert Message-Id: <199809150156.SAA12652@usr05.primenet.com> Subject: Re: Download of FreeBSD 3.0-SNAP To: dg@root.com Date: Tue, 15 Sep 1998 01:56:16 +0000 (GMT) Cc: tlambert@primenet.com, joelh@gnu.org, tom@uniserve.com, gpalmer@FreeBSD.ORG, irc@cooltime.simplenet.com, freebsd-current@FreeBSD.ORG In-Reply-To: <199809150022.RAA21739@implode.root.com> from "David Greenman" at Sep 14, 98 05:22:29 pm X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > >Note that David points out that FreeBSD *does* do elevator sorting; > >it's still not optimal, however, since physical and logical cylinder > >boundaries are infrequently the same on modern hardware. > > FreeBSD's disksort function sorts by block number, not by cylinder number. Hence it being non-optimal; see Mike's post... optimial is "always does exactly the right thing". It's not pessimal, either (as Mike pointed out, too). Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message