From owner-freebsd-stable@freebsd.org Sun Jan 28 15:51:29 2018 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 32F06ECE152 for ; Sun, 28 Jan 2018 15:51:29 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id B11B482BA2 for ; Sun, 28 Jan 2018 15:51:28 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221] (may be forged)) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id w0SFpFX5057124 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 28 Jan 2018 16:51:16 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: Andre.Albsmeier@siemens.com Received: from [10.58.0.4] ([10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id w0SFpARF048089 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Sun, 28 Jan 2018 22:51:10 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: i386 with 4GB RAM: less than 2GB available on A2SAV (Intel Atom E3940) To: Andre Albsmeier , freebsd-stable@freebsd.org References: <20180128145703.GA80724@bali> From: Eugene Grosbein Message-ID: <5A6DF168.3010902@grosbein.net> Date: Sun, 28 Jan 2018 22:51:04 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <20180128145703.GA80724@bali> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=2.2 required=5.0 tests=BAYES_00, LOCAL_FROM, RDNS_NONE autolearn=no autolearn_force=no version=3.4.1 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 1.9 RDNS_NONE Delivered to internal network by a host with no rDNS * 2.6 LOCAL_FROM From my domains X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on hz.grosbein.net X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Jan 2018 15:51:29 -0000 28.01.2018 21:57, Andre Albsmeier wrote: > I have a lot of machines running with 4 GB physical RAM and, for > some reasons, I still have to use a 32 bits OS. > > All of them show something between 3 and 3.5 GB of RAM available > in dmesg but the brand new Supermicro A2SAV really shocked me: > > FreeBSD 11.1-STABLE #0: Mon Jan 15 06:57:10 CET 2018 > ... > real memory = 4294967296 (4096 MB) > avail memory = 1939558400 (1849 MB) > ... > > So do people have any ideas how I might get a bit closer to at least > 3 GB? I assume there are no FreeBSD knobs which might help but hope > dies last... First, try to decrease amount of RAM dedicated to integrated video, if any (BIOS Setup). Also, I'd like to know reasons that made you stick to 32 bit OS as we have pretty good support for 32 bit applications running under 64 bit system.