From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267532AbUBSUKp (ORCPT ); Thu, 19 Feb 2004 15:10:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267541AbUBSUKp (ORCPT ); Thu, 19 Feb 2004 15:10:45 -0500 Received: from bi01p1.co.us.ibm.com ([32.97.110.142]:4110 "EHLO linux.local") by vger.kernel.org with ESMTP id S267532AbUBSUKl (ORCPT ); Thu, 19 Feb 2004 15:10:41 -0500 Date: Thu, 19 Feb 2004 05:04:43 -0800 From: "Paul E. McKenney" To: Christoph Hellwig , Andrew Morton , arjanv@redhat.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, torvalds@osdl.org Subject: Re: Non-GPL export of invalidate_mmap_range Message-ID: <20040219130442.GJ1269@us.ibm.com> Reply-To: paulmck@us.ibm.com References: <20040218140021.GB1269@us.ibm.com> <20040218211035.A13866@infradead.org> <20040218150607.GE1269@us.ibm.com> <20040218222138.A14585@infradead.org> <20040218145132.460214b5.akpm@osdl.org> <20040218230055.A14889@infradead.org> <20040218153234.3956af3a.akpm@osdl.org> <20040219123237.B22406@infradead.org> <20040219105608.30d2c51e.akpm@osdl.org> <20040219190141.A26888@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040219190141.A26888@infradead.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 19, 2004 at 07:01:41PM +0000, Christoph Hellwig wrote: > On Thu, Feb 19, 2004 at 10:56:08AM -0800, Andrew Morton wrote: > > inter-node cache consistency. Other distributed filesystems will need this > > and probably AIX already provides it. > > You've probably not seen the AIX VM architecture. Good for you as it's > not good for your stomache. I did when I still was SCAldera and although > my NDAs don't allow me to go into details I can tell you that the AIX > VM architecture is deeply tied into the segment architecture of the Power > CPU and signicicantly different from any other UNIX variant. > > So porting code from AIX that touches anything VM related is a complete > rewrite. Or, alternatively, requires a surprisingly large glue-code layer. Thanx, Paul