From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758237AbXGLRxe (ORCPT ); Thu, 12 Jul 2007 13:53:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754146AbXGLRx1 (ORCPT ); Thu, 12 Jul 2007 13:53:27 -0400 Received: from waste.org ([66.93.16.53]:44609 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752878AbXGLRx0 (ORCPT ); Thu, 12 Jul 2007 13:53:26 -0400 Date: Thu, 12 Jul 2007 12:53:09 -0500 From: Matt Mackall To: Andrea Arcangeli Cc: linux-kernel@vger.kernel.org Subject: Re: RFC: CONFIG_PAGE_SHIFT (aka software PAGE_SIZE) Message-ID: <20070712175308.GW11166@waste.org> References: <20070706222651.GG5777@v2.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070706222651.GG5777@v2.random> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jul 07, 2007 at 12:26:51AM +0200, Andrea Arcangeli wrote: > The original idea of having a software page size larger than a > hardware page size, originated at SUSE by myself and Andi Kleen while > helping AMD to design their amd64 cpu, Original? This was done on VAXen and in Mach ages ago. On Linux, there've already been two implementations, one by Hugh Dickens and an expanded version by Bill Irwin (presented at OLS in 2003). Bill's patch was notable for going to heroic efforts to maintain binary compatibility, basically separating the userspace notion of the ABI's page size from the kernel's. How's your version fair here? -- Mathematics is the supreme nostalgia of our time.