From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753466AbaCBVC2 (ORCPT ); Sun, 2 Mar 2014 16:02:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:50761 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752043AbaCBVC1 (ORCPT ); Sun, 2 Mar 2014 16:02:27 -0500 Date: Sun, 2 Mar 2014 16:02:01 -0500 From: Dave Jones To: Andreas Mohr Cc: Chris Bainbridge , Dennis Mungai , Borislav Petkov , "H. Peter Anvin" , x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86: set Pentium M as PAE capable Message-ID: <20140302210201.GA31948@redhat.com> Mail-Followup-To: Dave Jones , Andreas Mohr , Chris Bainbridge , Dennis Mungai , Borislav Petkov , "H. Peter Anvin" , x86@kernel.org, linux-kernel@vger.kernel.org References: <20140228140043.GA12157@debian.local> <20140302205619.GA8676@rhlx01.hs-esslingen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140302205619.GA8676@rhlx01.hs-esslingen.de> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Mar 02, 2014 at 09:56:19PM +0100, Andreas Mohr wrote: > (BTW, would it be possible to transform Linux's PAE support into > boot-config or even fully runtime-detectable boot switching to > (non-)PAE, similar to or exceeding what XP offers with its static > boot-time flag? > Last time I checked PAE support config defines were spread over ~ 40 > kernel source files though :-((() It would be a considerable amount of work to make it a runtime thing. Ten years ago, maybe it would be worth the effort perhaps, but I'd suggest just letting 32-bit slowly die instead of doing dramatic overhauls that will no doubt introduce a bunch of regressions in code that's been notoriously awful to debug issues in during the past. Dave