From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 6 Sep 2001 18:02:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 6 Sep 2001 18:02:00 -0400 Received: from smtp10.atl.mindspring.net ([207.69.200.246]:1321 "EHLO smtp10.atl.mindspring.net") by vger.kernel.org with ESMTP id ; Thu, 6 Sep 2001 18:01:43 -0400 Subject: [PATCH] (Updated) Preemptible Kernel From: Robert Love To: linux-kernel@vger.kernel.org Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Evolution/0.13.99+cvs.2001.09.05.07.08 (Preview Release) Date: 06 Sep 2001 18:02:06 -0400 Message-Id: <999813729.2039.9.camel@phantasy> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Available at (about 29K): http://tech9.net/rml/linux/patch-rml-2.4.10-pre4-preempt-kernel-1 http://tech9.net/rml/linux/patch-rml-2.4.9-ac9-preempt-kernel-1 for kernel 2.4.10-pre4 and 2.4.9-ac9, respectively. Changes since previous post: * update for new kernels * fix newline/space format buglet Changes since original patch: * fix compile bug -- CONFIG_HAVE_DEC_LOCK is set as needed, now. This patch allows a new config setting, CONFIG_PREEMPT (set in `Processor Type and Features') that enables a fully preemptible kernel. Preemption is controled via SMP lock points. Control of execution is yielded to higher processes even if the currently running process is in kernel space. This should increase response and decrease latency, and is a highly recommended patch for real-time, audio, and embedded systems. However, it is recommended for anyone. I use it on my everyday workstation. An interesting new article on a preemptible kernel in linux is available at: http://www.linuxdevices.com/articles/AT5152980814.html -- Robert M. Love rml at ufl.edu rml at tech9.net