Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932667AbVJ0WFy (ORCPT ); Thu, 27 Oct 2005 18:05:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932663AbVJ0WFy (ORCPT ); Thu, 27 Oct 2005 18:05:54 -0400 Received: from mx1.redhat.com ([66.187.233.31]:5847 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S932667AbVJ0WFw (ORCPT ); Thu, 27 Oct 2005 18:05:52 -0400 Date: Thu, 27 Oct 2005 18:05:33 -0400 From: Dave Jones To: Alejandro Bonilla Cc: Marcel Holtmann , linux-kernel@vger.kernel.org Subject: Re: 4GB memory and Intel Dual-Core system Message-ID: <20051027220533.GA18773@redhat.com> Mail-Followup-To: Dave Jones , Alejandro Bonilla , Marcel Holtmann , linux-kernel@vger.kernel.org References: <1130445194.5416.3.camel@blade> <52mzkuwuzg.fsf@cisco.com> <20051027204923.M89071@linuxwireless.org> <1130446667.5416.14.camel@blade> <20051027205921.M81949@linuxwireless.org> <1130447261.5416.20.camel@blade> <20051027211203.M33358@linuxwireless.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051027211203.M33358@linuxwireless.org> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1517 Lines: 37 On Thu, Oct 27, 2005 at 05:15:50PM -0400, Alejandro Bonilla wrote: > On Thu, 27 Oct 2005 23:07:41 +0200, Marcel Holtmann wrote > > Hi Alejandro, > > > > > > the board in this system is a Intel D945GNT and the box tells me the > > > > maximum supported amount of RAM is 4 GB. So there should be a way to > > > > address this amount memory. > > > > > > The board did take the 4GB of RAM and it is finding them, therefore supports > > > them. It is just not designed to give a full 4GB of RAM to the system, it only > > > gives 3.4XGB RAM and the rest is really not used, then basically the system > > > just tries to give the 0.6xGB RAM remaining a task by it being used by "System > > > Resources" > > > > > > This isn't really Linux dependant. > > > > so there is no way to give me back the "lost" memory. Is it possible > > that another motherboard might help? > > AFAIK, No. AMD and Intel will always do the same thing until we all move to > real IA64. Somehow, I doubt AMD see it that way :-) Some boards at least have a BIOS option to support 'memory hoisting' to map the 'lost' memory above the 4G address space. I suspect a lot of the lower-end (and older) boards however don't have this option, as they were not tested with 4GB. Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/