From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261221AbTEESex (ORCPT ); Mon, 5 May 2003 14:34:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261217AbTEESex (ORCPT ); Mon, 5 May 2003 14:34:53 -0400 Received: from watch.techsource.com ([209.208.48.130]:52980 "EHLO techsource.com") by vger.kernel.org with ESMTP id S261214AbTEESd3 (ORCPT ); Mon, 5 May 2003 14:33:29 -0400 Message-ID: <3EB6B22B.7090009@techsource.com> Date: Mon, 05 May 2003 14:49:15 -0400 From: Timothy Miller User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Valdis.Kletnieks@vt.edu CC: thunder7@xs4all.nl, Gabe Foobar , linux-kernel@vger.kernel.org Subject: Re: will be able to load new kernel without restarting? References: <20030503205656.GA19352@middle.of.nowhere> <200305032252.h43Mq7X9006633@turing-police.cc.vt.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Valdis.Kletnieks@vt.edu wrote: but I don't see any easy way > to implement rmmmod/insmod semantics for things like kernel/schedule.c (how > would you get your next timeslice?). This isn't such a silly idea, really. How much code would be required for a default, completely brainless scheduler? That's built-in. When you load a new scheduler, the default one doesn't get kicked out; it just gets turned off. When you unload, the default takes over. The only major issue is that the data structures used to manage processes would be different from one scheduler to the next. One possible answer would be to have an unloading driver translate all of its process information into the default scheduler's format. A newly loaded one would translate it to its own format. Things that would be lost in the translation include interactivity information, etc. Please forgive my total ignorance about how processes are represented in data structures in the linux kernel.