Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030216AbVJ1Pp5 (ORCPT ); Fri, 28 Oct 2005 11:45:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030217AbVJ1Pp5 (ORCPT ); Fri, 28 Oct 2005 11:45:57 -0400 Received: from linuxwireless.org.ve.carpathiahost.net ([66.117.45.234]:47250 "EHLO linuxwireless.org.ve.carpathiahost.net") by vger.kernel.org with ESMTP id S1030216AbVJ1Pp5 (ORCPT ); Fri, 28 Oct 2005 11:45:57 -0400 From: "Alejandro Bonilla" To: ebiederm@xmission.com (Eric W. Biederman) Cc: Marcel Holtmann , linux-kernel@vger.kernel.org Subject: Re: 4GB memory and Intel Dual-Core system Date: Fri, 28 Oct 2005 11:45:54 -0400 Message-Id: <20051028154109.M9269@linuxwireless.org> In-Reply-To: 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> X-Mailer: Open WebMail 2.40 20040816 X-OriginatingIP: 16.126.157.6 (abonilla@linuxwireless.org) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1506 Lines: 44 On Fri, 28 Oct 2005 09:29:34 -0600, Eric W. Biederman wrote > "Alejandro Bonilla" writes: > > >> 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. > > IA64 inherits this part of the architecture from x86, so no magic > fix. This is a fundamentally a chipset limitation, not an > architectural bug. Probably, but if they add a function to support this, then is a Fix, else it would have been there all the time. > > rev-E amd64 cpus from AMD all have memory hoisting support, > as do all server chipsets from Intel for the last several years. Not according to the link I provided since we started the conversation. But they have done tweaks to start "supporting" all this memory. > > To avoid this you just need a good chipset and a good BIOS implementation. > Any recent server board should be fine. Hopefully the desktop boards > will catch up soon. I doubt it, Intel is slowly moving to 64bit so applications and OS can catch up in the future to leave 32bit behind. (Probably) Anyway, I think Marcel got most of he's doubt answered. .Alejandro > > Eric - 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/