From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262458AbTL2Cz3 (ORCPT ); Sun, 28 Dec 2003 21:55:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262540AbTL2Cz3 (ORCPT ); Sun, 28 Dec 2003 21:55:29 -0500 Received: from holomorphy.com ([199.26.172.102]:65203 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S262458AbTL2Cz2 (ORCPT ); Sun, 28 Dec 2003 21:55:28 -0500 Date: Sun, 28 Dec 2003 18:55:07 -0800 From: William Lee Irwin III To: mfedyk@matchmail.com, Linus Torvalds , "Eric W. Biederman" , Anton Ertl , linux-kernel@vger.kernel.org Subject: Re: Page Colouring (was: 2.6.0 Huge pages not working as expected) Message-ID: <20031229025507.GT22443@holomorphy.com> Mail-Followup-To: William Lee Irwin III , mfedyk@matchmail.com, Linus Torvalds , "Eric W. Biederman" , Anton Ertl , linux-kernel@vger.kernel.org References: <179fV-1iK-23@gated-at.bofh.it> <179IS-1VD-13@gated-at.bofh.it> <2003Dec27.212103@a0.complang.tuwien.ac.at> <20031228163952.GQ22443@holomorphy.com> <20031229003631.GE1882@matchmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20031229003631.GE1882@matchmail.com> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Dec 27, 2003 at 08:53:30PM -0800, Linus Torvalds wrote: >>> Yes. This is something I actually want to do anyway for 2.7.x. Dan >>> Phillips had some patches for this six months ago. >>> You have to be careful, since you have to be able to mmap "partial pages", >>> which is what makes it less than trivial, but there are tons of reasons to >>> want to do this, and cache coloring is actually very much a secondary >>> concern. On Sun, Dec 28, 2003 at 08:39:52AM -0800, William Lee Irwin III wrote: >> I've not seen Dan Phillips' code for this. I've been hacking on >> something doing this since late last December. On Sun, Dec 28, 2003 at 04:36:31PM -0800, Mike Fedyk wrote: > I remember his work on pagetable sharing, but haven't heard anything about > changing the page size from him. > Could this be what Linus is remembering? Doubtful. I suspect he may be referring to pgcl (sometimes called "subpages"), though Dan Phillips hasn't been involved in it. I guess we'll have to wait for Linus to respond to know for sure. -- wli