Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759689AbXFVWCz (ORCPT ); Fri, 22 Jun 2007 18:02:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754061AbXFVWCr (ORCPT ); Fri, 22 Jun 2007 18:02:47 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:53285 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753209AbXFVWCr (ORCPT ); Fri, 22 Jun 2007 18:02:47 -0400 Date: Sat, 23 Jun 2007 00:02:02 +0200 From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Linus Torvalds , Andrew Morton , Mike Galbraith , Arjan van de Ven , Thomas Gleixner , Dmitry Adamushko , Srivatsa Vaddagiri Subject: [patch] CFS scheduler, -v18 Message-ID: <20070622220202.GA16872@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.0.3 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2199 Lines: 58 i'm pleased to announce release -v18 of the CFS scheduler patchset. The rolled-up CFS patch against today's -git kernel, v2.6.22-rc5, v2.6.22-rc4-mm2, v2.6.21.5 or v2.6.20.14 can be downloaded from the usual place: http://people.redhat.com/mingo/cfs-scheduler/ The biggest change in -v18 are various performance related improvements. Thomas Gleixner has eliminated expensive 64-bit divisions by converting the arithmetics to scaled math (without impacting the quality of calculations). Srivatsa Vaddagiri and Dmitry Adamushko have continued the abstraction and cleanup work. Srivatsa Vaddagiri and Christoph Lameter fixed the NUMA balancing bug reported by Paul McKenney. There were also a good number of other refinements to the CFS code. (No reproducible behavioral regressions were reported against -v17 so far, so the 'behavioral' bits are mostly unchanged.) Changes since -v17: - implement scaled math speedups for CFS. (Thomas Gleixner) - lots of core code updates, cleanups and streamlining. (Srivatsa Vaddagiri, Dmitry Adamushko, me.) - bugfix: fix NUMA balancing. (Srivatsa Vaddagiri, Christoph Lameter, Paul E. McKenney) - feature: SCHED_IDLE now also implies block-scheduler (CFQ) idle-IO-priority. (suggested by Thomas Sattler, picked up from -ck) - build fix for ppc32. (reported, tested and confirmed fixed by Art Haas) - ARM fix. (reported and debugged by Thomas Gleixner) - cleanup: implemented idle_sched_class in kernel/sched_idletask.c as a way to separate out rq->idle handling out of the core scheduler. This made a good deal of idle-task related special-cases go away. - debug: make the sysctls safer by introducing high and low limits. - cleanup: move some of the debug counters to under CONFIG_SCHEDSTATS. - speedup: various micro-optimizations - various other small updates. As usual, any sort of feedback, bugreport, fix and suggestion is more than welcome! Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/