From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262782AbTL2GxA (ORCPT ); Mon, 29 Dec 2003 01:53:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262784AbTL2Gw7 (ORCPT ); Mon, 29 Dec 2003 01:52:59 -0500 Received: from holomorphy.com ([199.26.172.102]:43188 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S262782AbTL2Gw6 (ORCPT ); Mon, 29 Dec 2003 01:52:58 -0500 Date: Sun, 28 Dec 2003 22:52:40 -0800 From: William Lee Irwin III To: Linus Torvalds Cc: mfedyk@matchmail.com, "Eric W. Biederman" , Anton Ertl , Kernel Mailing List , phillips@arcor.de Subject: Re: Page Colouring (was: 2.6.0 Huge pages not working as expected) Message-ID: <20031229065240.GU22443@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Linus Torvalds , mfedyk@matchmail.com, "Eric W. Biederman" , Anton Ertl , Kernel Mailing List , phillips@arcor.de 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> <20031229025507.GT22443@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 Sun, Dec 28, 2003 at 08:09:17PM -0800, Linus Torvalds wrote: > I didn't see the patch itself, but I spent some time talking to Daniel > after your talk at the kernel summit. At least I _think_ it was him I was > talking to - my memory for names and faces is basically zero. > Daniel claimed to have it working back then, and that it actually shrank > the kernel source code. The basic approach is to just make PAGE_SIZE > larger, and handle temporary needs for smaller subpages by just > dynamically allocating "struct page" entries for them. The size reduction > came from getting rid of the "struct buffer_head", because it ends up > being just another "small page". > Daniel, details? I also heard something about this from daniel. The description I was given implied rather different functionality, and raised rather serious questions about the implementation he didn't have adequate answers for. I also never saw code, despite months of occasional discussions about it. I did get a positive reaction from you at KS, and I've also been slaving away at keeping this thing current and improving it when I can for a year. Would you mind telling me what the Hell is going on here? I guess I already know I'm screwed beyond all hope of recovery, but I might as well get official confirmation. -- wli