Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759486AbWLKCTr (ORCPT ); Sun, 10 Dec 2006 21:19:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762265AbWLKCTr (ORCPT ); Sun, 10 Dec 2006 21:19:47 -0500 Received: from tone.orchestra.cse.unsw.EDU.AU ([129.94.242.59]:43064 "EHLO tone.orchestra.cse.unsw.EDU.AU" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759486AbWLKCTr (ORCPT ); Sun, 10 Dec 2006 21:19:47 -0500 From: Paul Cameron Davies To: Jeremy Fitzhardinge Date: Mon, 11 Dec 2006 13:19:38 +1100 (EST) X-X-Sender: pauld@weill.orchestra.cse.unsw.EDU.AU cc: Andrew Morton , David Singleton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Lee.Schermerhorn@hp.com Subject: Re: new procfs memory analysis feature In-Reply-To: <4579DD22.70609@goop.org> Message-ID: References: <45789124.1070207@mvista.com> <20061207143611.7a2925e2.akpm@osdl.org> <4579DD22.70609@goop.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1288 Lines: 26 On Fri, 8 Dec 2006, Jeremy Fitzhardinge wrote: > I looked at implementing linear pagetable mappings for x86 as a way of > getting rid of CONFIG_HIGHPTE, and to make pagetable manipulations > generally more efficient. I gave up on it after a while because all the > existing pagetable accessors are not suitable for a linear pagetable, > and I didn't want to have to introduce a pile of new pagetable > interfaces. Would the PTI interface be helpful for this? Yes. The PTI is a useful vehicle for experimentation with page tables. The PTI has two components. The first component provides for architectural and implementation independent page table access. The second component provides for architecture dependendent access, but I have only done this for IA64. However, abstracting out the page table implementation for the arch dependent stuff on x86 would enable experimentation with implementing linear page table mappings for x86, while leaving the current implementation in place as an alternative page table. Cheers Paul Davies - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/