From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753528AbXDQKmM (ORCPT ); Tue, 17 Apr 2007 06:42:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753530AbXDQKmL (ORCPT ); Tue, 17 Apr 2007 06:42:11 -0400 Received: from holomorphy.com ([66.93.40.71]:48423 "EHLO holomorphy.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753528AbXDQKmK (ORCPT ); Tue, 17 Apr 2007 06:42:10 -0400 Date: Tue, 17 Apr 2007 03:41:41 -0700 From: William Lee Irwin III To: Peter Williams Cc: Linux Kernel Mailing List Subject: Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS] Message-ID: <20070417104141.GV8915@holomorphy.com> References: <20070416110439.GH2986@holomorphy.com> <46237239.1070903@bigpond.net.au> <20070416135915.GK8915@holomorphy.com> <46241677.7060909@bigpond.net.au> <20070417025704.GM8915@holomorphy.com> <462445EC.1060306@bigpond.net.au> <20070417053147.GN8915@holomorphy.com> <46246A7C.8050501@bigpond.net.au> <20070417064109.GP8915@holomorphy.com> <46247E86.5090706@bigpond.net.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46247E86.5090706@bigpond.net.au> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org William Lee Irwin III wrote: >> Comments on which directions you'd like this to go in these respects >> would be appreciated, as I regard you as the current "project owner." On Tue, Apr 17, 2007 at 06:00:06PM +1000, Peter Williams wrote: > I'd do scan through LKML from about 18 months ago looking for mention of > runtime configurable version of plugsched. Some students at a > university (in Germany, I think) posted some patches adding this feature > to plugsched around about then. Excellent. I'll go hunting for that. On Tue, Apr 17, 2007 at 06:00:06PM +1000, Peter Williams wrote: > I never added them to plugsched proper as I knew (from previous > experience when the company I worked for posted patches with similar > functionality) that Linux would like this idea less than he did the > current plugsched mechanism. Odd how the requirements ended up including that. Fickleness abounds. If only we knew up-front what the end would be. On Tue, Apr 17, 2007 at 06:00:06PM +1000, Peter Williams wrote: > Unfortunately, my own cache of the relevant e-mails got overwritten > during a Fedora Core upgrade (I've since moved /var onto a separate > drive to avoid a repetition) or I would dig them out and send them to > you. I'd provided with copies of the company's patches to use as a > guide to how to overcome the problems associated with changing > schedulers on a running system (a few non trivial locking issues pop up). > Maybe if one of the students still reads LKML he will provide a pointer. I was tempted to restart from scratch given Ingo's comments, but I reconsidered and I'll be working with your code (and the German students' as well). If everything has to change, so be it, but it'll still be a derived work. It would be ignoring precedent and failure to properly attribute if I did otherwise. -- wli