From owner-freebsd-stable@FreeBSD.ORG Wed Nov 10 22:53:39 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D118016A4CE for ; Wed, 10 Nov 2004 22:53:39 +0000 (GMT) Received: from smtp13.wxs.nl (smtp13.wxs.nl [195.121.6.27]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6990843D31 for ; Wed, 10 Nov 2004 22:53:39 +0000 (GMT) (envelope-from ronald-freebsd8@klop.yi.org) Received: from ronald.echteman.nl (ip51cdc5d2.speed.planet.nl [81.205.197.210]) by smtp13.wxs.nlSMTP id <0I6Z008Y9JLEHX@smtp13.wxs.nl> for freebsd-stable@freebsd.org; Wed, 10 Nov 2004 23:53:38 +0100 (CET) Received: (qmail 13934 invoked from network); Wed, 10 Nov 2004 22:53:37 +0000 Received: from unknown (HELO laptop.thuis.klop.ws) (192.168.1.4) by ronald.echteman.nl with SMTP; Wed, 10 Nov 2004 22:53:37 +0000 Received: (qmail 1243 invoked from network); Wed, 10 Nov 2004 22:53:26 +0000 Received: from localhost.thuis.klop.ws (HELO smtp.local) (127.0.0.1) by localhost.thuis.klop.ws with SMTP; Wed, 10 Nov 2004 22:53:26 +0000 Date: Wed, 10 Nov 2004 23:53:23 +0100 From: Ronald Klop In-reply-to: <20041110084132.GA699@gambit.com.ru> To: ls+lists.freebsd.org.mailman.listinfo.freebsd-stable93930659@gambit.com.ru, freebsd-stable@freebsd.org Message-id: MIME-version: 1.0 Content-type: text/plain; format=flowed; delsp=yes; charset=iso-8859-1 Content-transfer-encoding: 7BIT User-Agent: Opera M2/7.54 (FreeBSD, build 751) References: <20041105110830.GP58031@gambit.com.ru> <20041105215427.GA33096@xor.obsecurity.org> <20041109083810.GJ58031@gambit.com.ru> <20041110084132.GA699@gambit.com.ru> Subject: Re: md /tmp mfs rw,-s64m 0 0 in fstab instead of tmpmfs="YES" in rc.conf: no panic X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Nov 2004 22:53:39 -0000 On Wed, 10 Nov 2004 11:41:32 +0300, wrote: >>>>> This host has 192 MB of RAM and 512 MB of swap. >>>>> /sbin/mdmfs -i 4096 -s $1 md $2 > >>> Kris Kennaway wrote: >>>> You don't have enough RAM in your system to do that. >>> I'm running mdmfs WITHOUT "-M" flag. > > Ronald Klop wrote: >> Just set up your tmp from fstab with "md /tmp mfs rw,-s64m 0 0". > > Swap space is actually used in this case, thank you! > >> If you look at the code which handles tmpmfs it is used for diskless >> booting. > > "By default, mdmfs creates a swap-based (MD_SWAP) disk" -- from > mdmfs(8). > >> So there is no swap usable for ramdisk. > > Should I send-pr a bug in mdmfs(8)? Maybe I'm missing something, but tmpmfs works malloc-based by default. tmpmfs is not an easy way to set up a swap-based ramdisk. It is meant to setup diskless systems easily. # cd /etc/rc.d # grep -A 2 tmpmfs * tmp:case "${tmpmfs}" in tmp-[Yy][Ee][Ss]) tmp- mount_md ${tmpsize} /tmp # grep -A 2 mount_md * initdiskless:mount_md() { initdiskless- /sbin/mdmfs -i 4096 -s $1 -M md $2 initdiskless-} Ronald. -- Ronald Klop, Amsterdam, The Netherlands