From owner-freebsd-hackers Fri Aug 11 1:42:40 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from krell.webweaver.net (krell.webweaver.net [206.24.105.170]) by hub.freebsd.org (Postfix) with ESMTP id DF27F37BFD1; Fri, 11 Aug 2000 01:42:37 -0700 (PDT) (envelope-from nicole@unixgirl.com) Received: from xwin.nmhtech.com (xwin.nmhtech.com [208.138.46.10]) by krell.webweaver.net (Postfix) with ESMTP id 2C07220F04; Fri, 11 Aug 2000 01:38:57 -0700 (PDT) Content-Length: 1834 Message-ID: X-Mailer: XFMail 1.4.0 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Fri, 11 Aug 2000 01:42:37 -0700 (PDT) From: "Nicole Harrington." To: Brian Fundakowski Feldman Subject: Re: /tmp on a ramdisk? Cc: dillon@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG, Doug Barton , Adam Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 30-Jul-00 Brian Fundakowski Feldman wrote: > The issue is that mount_mfs is simply newfs with a catch: it > constructs the new filesystem completely in memory and lives on as > the storage for the mounted filesystem. If you view the processes on > a system using MFS, you will notice that one of them is the original > mount_mfs, having become a daemon. > > Yes, things are stored twice in memory: once in the buffer cache and > once in the MFS process. Yes, they are also copied multiple times. > MFS simply can't perform as well as you might expect. The malloc disk > device can because it simply creates a kernel-memory backing store. > The disadvantage here is that it's wired memory and can't get swapped > out like mount_mfs can. > > -- > Brian Fundakowski Feldman \ FreeBSD: The Power to Serve! / > green@FreeBSD.org `------------------------------' > > Please forgive my late reply.. Just trying to catch up.. Given all of the above statements, why does BSD/OS (at least on 4.0 and 4.1) want to set up tmp as a Ramdisk? I don't even think there is a way around it during the install. Nicole > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message nicole@unixgirl.com |\ __ /| (`\ http://www.unixgirl.com/ webmistress@dangermouse.org | o_o |__ ) ) http://www.dangermouse.org/ // \\ ---------------------------(((---(((----------------------------------------- -- Powered by Coka-Cola and FreeBSD -- -- Strong enough for a man - But made for a Woman -- -- OWNED? MS: Who's Been In/Virused Your Computer Today? -- ------------------------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message