From owner-freebsd-questions@FreeBSD.ORG  Wed Jun  4 00:24:25 2008
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 20D79106567E
	for <freebsd-questions@freebsd.org>;
	Wed,  4 Jun 2008 00:24:25 +0000 (UTC)
	(envelope-from fbsd06+WS=43ca7fce@mlists.homeunix.com)
Received: from turtle-out.mxes.net (turtle-out.mxes.net [216.86.168.191])
	by mx1.freebsd.org (Postfix) with ESMTP id E32348FC2D
	for <freebsd-questions@freebsd.org>;
	Wed,  4 Jun 2008 00:24:24 +0000 (UTC)
	(envelope-from fbsd06+WS=43ca7fce@mlists.homeunix.com)
Received: from mxout-03.mxes.net (mxout-03.mxes.net [216.86.168.178])
	by turtle-in.mxes.net (Postfix) with ESMTP id 583D2164701
	for <freebsd-questions@freebsd.org>;
	Tue,  3 Jun 2008 20:07:46 -0400 (EDT)
Received: from gumby.homeunix.com. (unknown [87.81.140.128])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by smtp.mxes.net (Postfix) with ESMTP id 51FF123E3E9
	for <freebsd-questions@freebsd.org>;
	Tue,  3 Jun 2008 20:07:41 -0400 (EDT)
Date: Wed, 4 Jun 2008 01:07:31 +0100
From: RW <fbsd06@mlists.homeunix.com>
To: freebsd-questions@freebsd.org
Message-ID: <20080604010731.3de6d359@gumby.homeunix.com.>
In-Reply-To: <92E18C61-A552-4B36-AF81-6790E7A340D3@vindaloo.com>
References: <92E18C61-A552-4B36-AF81-6790E7A340D3@vindaloo.com>
X-Mailer: Claws Mail 3.4.0 (GTK+ 2.12.9; i386-portbld-freebsd7.0)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Subject: Re: md, mount_mfs and swap
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 04 Jun 2008 00:24:25 -0000

On Tue, 3 Jun 2008 17:43:27 -0400
Christopher Sean Hilton <chris@vindaloo.com> wrote:

> I've recently started playing with NetBSD and notice that by default  
> it mounts /tmp as an MFS backed by swap. A quick read of the md,  
> mount_mfs man page would lead me to believe that
> 
>       md /tmp rw,async,-s1024m 0 0
> 
> will move my /tmp dir to a swap backed 1G space. This would make me  
> feel much more comfortable about my continuing adherence to the  
> practice of giving my machine twice as much swap space as they have  
> memory.
> 
> Are there any downsides to this?
> 

Not in my experience. You can do it simply by adding the following to
rc.conf

tmpmfs="YES"
tmpsize="1024m"