From owner-freebsd-current@FreeBSD.ORG Thu May 27 05:49:08 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2B75C16A4CE for ; Thu, 27 May 2004 05:49:08 -0700 (PDT) Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 435A843D49 for ; Thu, 27 May 2004 05:49:07 -0700 (PDT) (envelope-from ticso@cicely12.cicely.de) Received: from cicely5.cicely.de (cicely5.cicely.de [IPv6:3ffe:400:8d0:301:200:92ff:fe9b:20e7]) (authenticated bits=0) i4RCkNDv080056 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=OK); Thu, 27 May 2004 14:46:51 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (cicely12.cicely.de [IPv6:3ffe:400:8d0:301::12]) by cicely5.cicely.de (8.12.10/8.12.10) with ESMTP id i4RCjEUi041430 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 27 May 2004 14:45:15 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (localhost [127.0.0.1]) by cicely12.cicely.de (8.12.11/8.12.11) with ESMTP id i4RCjERL018545; Thu, 27 May 2004 14:45:14 +0200 (CEST) (envelope-from ticso@cicely12.cicely.de) Received: (from ticso@localhost) by cicely12.cicely.de (8.12.11/8.12.11/Submit) id i4RCjD3w018544; Thu, 27 May 2004 14:45:13 +0200 (CEST) (envelope-from ticso) Date: Thu, 27 May 2004 14:45:13 +0200 From: Bernd Walter To: Ivan Voras Message-ID: <20040527124512.GV63479@cicely12.cicely.de> References: <40B4ECC8.50808@fer.hr> <20040526202849.GA37162@freebie.xs4all.nl> <40B519DA.7000708@fer.hr> <20040527120819.B8434@gamplex.bde.org> <40B5DE26.4040901@fer.hr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <40B5DE26.4040901@fer.hr> X-Operating-System: FreeBSD cicely12.cicely.de 5.2-CURRENT alpha User-Agent: Mutt/1.5.6i X-Spam-Status: No, hits=-4.9 required=3.0 tests=BAYES_00 autolearn=ham version=2.61 X-Spam-Report: * -4.9 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] X-Spam-Checker-Version: SpamAssassin 2.61 (1.212.2.1-2003-12-09-exp) on cicely5.cicely.de cc: current@freebsd.org Subject: Re: Softupdates a mount option? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: ticso@cicely.de List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 27 May 2004 12:49:08 -0000 On Thu, May 27, 2004 at 02:25:10PM +0200, Ivan Voras wrote: > Bruce Evans wrote: > > > On Thu, 27 May 2004, Ivan Voras wrote: > > > > > >>- I was creating a md drive with mdmfs, and it felt rather awkward to > >>control softupdates via command line parameters (a sidequestion: does it > >>make any sense enabling SU on a memory drive by default?). As it seems > >>now, every such utility that handles (well, at least creates) a ffs > >>filesystem must handle SU-controlling options as command line parameters. > > > > > > It makes sense to never enable soft updates on a memory drive, since soft > > updates uses extra CPU cycles to try to speed up i/o to real drives (and > > Then maybe the default should be changed? > > From 'man mdmfs': > By default, mdmfs creates a swap-based (MD_SWAP) disk with soft-updates > enabled and mounts it on mount-point. swap != ram SU makes perfectly sense for swap backed md drives. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de