From owner-freebsd-stable@FreeBSD.ORG Fri Dec 21 10:24:39 2007 Return-Path: Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4F2E216A41A for ; Fri, 21 Dec 2007 10:24:39 +0000 (UTC) (envelope-from olli@lurza.secnetix.de) Received: from lurza.secnetix.de (lurza.secnetix.de [IPv6:2001:1b20:1:3::1]) by mx1.freebsd.org (Postfix) with ESMTP id AF4EC13C448 for ; Fri, 21 Dec 2007 10:24:38 +0000 (UTC) (envelope-from olli@lurza.secnetix.de) Received: from lurza.secnetix.de (localhost [127.0.0.1]) by lurza.secnetix.de (8.14.1/8.14.1) with ESMTP id lBLAOMxs099606; Fri, 21 Dec 2007 11:24:29 +0100 (CET) (envelope-from oliver.fromme@secnetix.de) Received: (from olli@localhost) by lurza.secnetix.de (8.14.1/8.14.1/Submit) id lBLAOLIS099605; Fri, 21 Dec 2007 11:24:21 +0100 (CET) (envelope-from olli) Date: Fri, 21 Dec 2007 11:24:21 +0100 (CET) Message-Id: <200712211024.lBLAOLIS099605@lurza.secnetix.de> From: Oliver Fromme To: freebsd-stable@FreeBSD.ORG, bri@brianwhalen.net, jcoombs@gwi.net In-Reply-To: <476ABD93.3080707@brianwhalen.net> X-Newsgroups: list.freebsd-stable User-Agent: tin/1.8.3-20070201 ("Scotasay") (UNIX) (FreeBSD/6.2-STABLE-20070808 (i386)) MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.1.2 (lurza.secnetix.de [127.0.0.1]); Fri, 21 Dec 2007 11:24:30 +0100 (CET) Cc: Subject: Re: FreeBSD 7 on old SMP server? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: freebsd-stable@FreeBSD.ORG, bri@brianwhalen.net, jcoombs@gwi.net List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 Dec 2007 10:24:39 -0000 Brian wrote: > Joshua Coombs wrote: > > For a very short while with 6.0 I was tweaking the kernel to detect > > 386s as 486s, as well as using CPU_DISABLE_CMPXCHG and having ok > > luck. I've now got a Cyrix 486DrX-2 66 installed in place of my > > Am386DX-40, which supports CMPXCHG as well as ID'ing as a 486 so I > > don't need to do any tweaking to stay running. > > > > If I can get another viable 386DX box reassembled I'll see if 7 can be > > pressed into functioning on it as 6 could. > > Would that be a multiday buildworld? I would certainly be wise to perform the buildworld on a faster machine and only do the installworld on the slow one. ALternatively, install directly on the slow machines disk if you can plug it into the fast one temporarily. By the way, I don't think that omitting -pipe helps that much on a machine that is really low on memory. It only separates the preprocessor and assembly stages from the main compilation, but it is the main compilation which is the actual memory hog (at least with gcc 4.2) due to the code optimization. Of course, omitting -pipe might help a little, but don't hold your breath. It might help much better to reduce the optimization level from the default -O2 to -O1 (in addition to omitting -pipe). Best regards Oliver -- Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M. Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung: secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün- chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd "With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead." -- RFC 1925