From owner-freebsd-stable@FreeBSD.ORG Mon Mar 4 21:24:12 2013 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 202BD1DC; Mon, 4 Mar 2013 21:24:12 +0000 (UTC) (envelope-from ken@kdm.org) Received: from nargothrond.kdm.org (nargothrond.kdm.org [70.56.43.81]) by mx1.freebsd.org (Postfix) with ESMTP id 274B21617; Mon, 4 Mar 2013 21:24:10 +0000 (UTC) Received: from nargothrond.kdm.org (localhost [127.0.0.1]) by nargothrond.kdm.org (8.14.2/8.14.2) with ESMTP id r24LOAGb019883; Mon, 4 Mar 2013 14:24:10 -0700 (MST) (envelope-from ken@nargothrond.kdm.org) Received: (from ken@localhost) by nargothrond.kdm.org (8.14.2/8.14.2/Submit) id r24LO8VF019882; Mon, 4 Mar 2013 14:24:08 -0700 (MST) (envelope-from ken) Date: Mon, 4 Mar 2013 14:24:08 -0700 From: "Kenneth D. Merry" To: Adrian Chadd Subject: Re: 9.1 minimal ram requirements Message-ID: <20130304212408.GA19842@nargothrond.kdm.org> References: <1356218834151-5771583.post@n5.nabble.com> <50D644E5.9070801@martenvijn.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2i Cc: Marten Vijn , Sergey Kandaurov , freebsd-stable@freebsd.org, jakub_lach@mailplus.pl X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Mar 2013 21:24:12 -0000 I just checked in a change to HEAD (247814) that compiles CTL in GENERIC but disables it by default. (i.e. it uses no memory) You can re-enable it with the existing loader tunable. i.e. set kern.cam.ctl.disable=0 in /boot/loader.conf and it will be enabled. Ken On Wed, Feb 27, 2013 at 18:26:28 -0800, Adrian Chadd wrote: > Hi Ken, > > I'd like to fix this for 9.2 and -HEAD. > > Would you mind if I disabled CTL in GENERIC (but still build it as a > module) until you've fixed the initial RAM reservation that it > requires? > > Thanks, > > > > Adrian > > > On 22 December 2012 22:32, Adrian Chadd wrote: > > Ken, > > > > Does CAM CTL really need to pre-allocate 35MB of RAM at startup? > > > > > > > > Adrian > > > > On 22 December 2012 16:45, Sergey Kandaurov wrote: > >> On 23 December 2012 03:40, Marten Vijn wrote: > >>> On 12/23/2012 12:27 AM, Jakub Lach wrote: > >>>> > >>>> Guys, I've heard about some absurd RAM requirements > >>>> for 9.1, has anybody tested it? > >>>> > >>>> e.g. > >>>> > >>>> http://forums.freebsd.org/showthread.php?t=36314 > >>> > >>> > >>> jup, I can comfirm this with nanobsd (cross) compiled > >>> for my soekris net4501 which has 64 MB mem: > >>> > >>> from dmesg: real memory = 67108864 (64 MB) > >>> > >>> while the same config compiled against a 9.0 tree still works... > >>> > >> > >> This (i.e. the "kmem_map too small" message seen with kernel memory > >> shortage) could be due to CAM CTL ('device ctl' added in 9.1), which is > >> quite a big kernel memory consumer. > >> Try to disable CTL in loader with kern.cam.ctl.disable=1 to finish boot. > >> A longer term workaround could be to postpone those memory allocations > >> until the first call to CTL. > >> > >> # cam ctl init allocates roughly 35 MB of kernel memory at once > >> # three memory pools, somewhat under M_DEVBUF, and memory disk > >> # devbuf takes 1022K with kern.cam.ctl.disable=1 > >> > >> Type InUse MemUse HighUse Requests Size(s) > >> devbuf 213 20366K - 265 16,32,64,128,256,512,1024,2048,4096 > >> ctlmem 5062 10113K - 5062 64,2048 > >> ctlblk 200 800K - 200 4096 > >> ramdisk 1 4096K - 1 > >> ctlpool 532 138K - 532 16,512 > >> > >> -- > >> wbr, > >> pluknet > >> _______________________________________________ > >> freebsd-stable@freebsd.org mailing list > >> http://lists.freebsd.org/mailman/listinfo/freebsd-stable > >> To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" -- Kenneth Merry ken@FreeBSD.ORG