Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964985AbWH2OPc (ORCPT ); Tue, 29 Aug 2006 10:15:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964986AbWH2OPc (ORCPT ); Tue, 29 Aug 2006 10:15:32 -0400 Received: from nf-out-0910.google.com ([64.233.182.187]:6043 "EHLO nf-out-0910.google.com") by vger.kernel.org with ESMTP id S964985AbWH2OPb (ORCPT ); Tue, 29 Aug 2006 10:15:31 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:mime-version:content-type:content-transfer-encoding:content-disposition; b=lCB2HrfJoz3VmNFK1fXHtbhuODxZ052Lb7x+xRzCCGvFp1WuXHXH288k+XVjgbsgjZ1z8WaOoALLawDLH8WELqq2XO1lKiCt3u5FmSCf75cYNWvlOV5kAlVaqVXq4ejDoW5FxgS+Qk1wMlfhEjJwUZRRbf258YvQwOZvmyMMtLg= Message-ID: Date: Tue, 29 Aug 2006 22:15:19 +0800 From: "Dong Feng" To: "Andi Kleen" , "Nick Piggin" , "Arjan van de Ven" , "Dong Feng" , "Paul Mackerras" , "Christoph Lameter" , "David Howells" Subject: The 3G (or nG) Kernel Memory Space Offset Cc: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 484 Lines: 9 The Linux kernel permenantly map 3-4G linear memory space to 0-4G physical memory space. My question is that what is the rationality behind this counterintuitive mapping. Is this just some personal choice for the earlier kernel developers? - 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/