From owner-freebsd-questions@FreeBSD.ORG Wed Jan 10 22:45:38 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7CBA116A4C2 for ; Wed, 10 Jan 2007 22:45:38 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.182]) by mx1.freebsd.org (Postfix) with ESMTP id BC70113C4A8 for ; Wed, 10 Jan 2007 22:45:37 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from mac.com (smtpin05-en2 [10.13.10.150]) by smtpout.mac.com (Xserve/8.12.11/smtpout12/MantshX 4.0) with ESMTP id l0AMUD9a006022; Wed, 10 Jan 2007 14:30:13 -0800 (PST) Received: from [17.214.13.96] (a17-214-13-96.apple.com [17.214.13.96]) (authenticated bits=0) by mac.com (Xserve/smtpin05/MantshX 4.0) with ESMTP id l0AMU944003008; Wed, 10 Jan 2007 14:30:11 -0800 (PST) In-Reply-To: References: Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <8D4A9630-A77A-44D1-8FD6-441975D683B1@mac.com> Content-Transfer-Encoding: 7bit From: Chuck Swiger Date: Wed, 10 Jan 2007 14:30:09 -0800 To: Jeff MacDonald X-Mailer: Apple Mail (2.752.2) X-Brightmail-Tracker: AAAAAA== X-Brightmail-scanned: yes Cc: FreeBSD Questions Subject: Re: Dell PE 1950 - Only seeing 3.2 gigs of ram X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jan 2007 22:45:38 -0000 On Jan 10, 2007, at 1:47 PM, Jeff MacDonald wrote: > I put a fresh install of 6.1-RELEASE on a dell poweredge 1950 server. > It's configured with 4 gigs of ram. > > However when I boot i get the following right before DMESG > > 786432k above 4GB ignored > > Which is strange, but then dmesg shows this > > real memory = 3489300480 (3327 MB) > avail memory = 3414659072 (3256 MB) Unless you compile a kernel with PAE, which extends the addressable physical memory, or have a EM64T capable CPU, the system is limited to only addressing 4GB of memory. However, the system also needs to make the various PCI devices and the AGP aperture accessible in memory space, so they typically reserve 512MB or 768MB at the top of the address space for that purpose; that memory is being remapped above 4GB, causing the message you see. It's probably reasonable to either live with it, or move 1GB to some other machine, if you can't run a 64-bit system or you have issues enabling PAE. -- -Chuck