From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 7 Mar 2003 06:25:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 7 Mar 2003 06:25:11 -0500 Received: from pc2-cwma1-4-cust86.swan.cable.ntl.com ([213.105.254.86]:17577 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Fri, 7 Mar 2003 06:25:10 -0500 Subject: Re: [PATCH] move SWAP option in menu From: Alan Cox To: Gabriel Paubert Cc: Tom Rini , "Randy.Dunlap" , randy.dunlap@verizon.net, Linux Kernel Mailing List In-Reply-To: <20030307100330.GA4758@iram.es> References: <3E657EBD.59E167D6@verizon.net> <20030305181748.GA11729@iram.es> <20030305131444.1b9b0cf2.rddunlap@osdl.org> <20030306184332.GA23580@ip68-0-152-218.tc.ph.cox.net> <20030306193344.GA29166@iram.es> <1046984808.18158.115.camel@irongate.swansea.linux.org.uk> <20030307100330.GA4758@iram.es> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Message-Id: <1047040872.20794.7.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.1 (1.2.1-4) Date: 07 Mar 2003 12:41:12 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2003-03-07 at 10:03, Gabriel Paubert wrote: > > Linux 8086 can swap because it can use CS/DS updates to relocate code/data. > > Unless I miss a subtle trick, that's using the segment registers as a > poor man's MMU. You can share library code with far calls but you can't > use "far" data pointers, can you? Linux 8086 doesnt support "far" anything. The segment registers are being used as base registers, and on 8086 "limit" isnt available.