From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755587Ab1C1Xxq (ORCPT ); Mon, 28 Mar 2011 19:53:46 -0400 Received: from e37.co.us.ibm.com ([32.97.110.158]:46135 "EHLO e37.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752598Ab1C1Xxp (ORCPT ); Mon, 28 Mar 2011 19:53:45 -0400 Date: Mon, 28 Mar 2011 16:53:38 -0700 From: "Paul E. McKenney" To: Luke Kenneth Casson Leighton Cc: Alan Cox , Will Newton , linux-kernel@vger.kernel.org Subject: Re: advice sought: practicality of SMP cache coherency implemented in assembler (and a hardware detect line) Message-ID: <20110328235338.GS2287@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20110326120847.71b6ae4d@lxorguk.ukuu.org.uk> <20110328180655.GI2287@linux.vnet.ibm.com> <20110328231818.2297408f@lxorguk.ukuu.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 29, 2011 at 12:39:30AM +0100, Luke Kenneth Casson Leighton wrote: > On Tue, Mar 29, 2011 at 12:38 AM, Luke Kenneth Casson Leighton > wrote: > > >  p.s. alan am not ignoring what you wrote, it's just that if this goes > > alan? beh?? paul. sorry :) ;-) FWIW, I believe that the http://www.scalemp.com/ folks do something similar to what Alan suggests in order to glue multiple x86 systems into one SMP system from the viewpoint of user applications. Thanx, Paul