From owner-freebsd-current@FreeBSD.ORG Thu May 27 06:06:00 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 AD6F016A4CE for ; Thu, 27 May 2004 06:06:00 -0700 (PDT) Received: from pinus.cc.fer.hr (pinus.cc.fer.hr [161.53.73.18]) by mx1.FreeBSD.org (Postfix) with ESMTP id D6D8943D39 for ; Thu, 27 May 2004 06:05:59 -0700 (PDT) (envelope-from ivoras@fer.hr) Received: from fer.hr (lara.cc.fer.hr [161.53.72.113]) by pinus.cc.fer.hr (8.12.2/8.12.2) with ESMTP id i4RD7msM027411; Thu, 27 May 2004 15:07:48 +0200 (MEST) Message-ID: <40B5E66F.7000507@fer.hr> Date: Thu, 27 May 2004 15:00:31 +0200 From: Ivan Voras User-Agent: Mozilla Thunderbird 0.5 (Windows/20040207) X-Accept-Language: en-us, en MIME-Version: 1.0 To: ticso@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> <20040527124512.GV63479@cicely12.cicely.de> In-Reply-To: <20040527124512.GV63479@cicely12.cicely.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: current@freebsd.org Subject: Re: Softupdates a mount option? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list 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 13:06:00 -0000 Bernd Walter wrote: >>>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. I always thought the "swap backed" meant the memory is allocated from the same pool as for userland applications, e.g. they only get swapped out if memory is scarce. Is this wrong? -- Every sufficiently advanced magic is indistinguishable from technology - Arthur C Anticlarke