From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267445AbUHJGdW (ORCPT ); Tue, 10 Aug 2004 02:33:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267444AbUHJGdW (ORCPT ); Tue, 10 Aug 2004 02:33:22 -0400 Received: from holomorphy.com ([207.189.100.168]:9702 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S267445AbUHJGc5 (ORCPT ); Tue, 10 Aug 2004 02:32:57 -0400 Date: Mon, 9 Aug 2004 23:32:54 -0700 From: William Lee Irwin III To: Andrew Morton Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.8-rc3-mm2 Message-ID: <20040810063254.GD11200@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Andrew Morton , linux-kernel@vger.kernel.org References: <20040808152936.1ce2eab8.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040808152936.1ce2eab8.akpm@osdl.org> User-Agent: Mutt/1.5.6+20040722i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Aug 08, 2004 at 03:29:36PM -0700, Andrew Morton wrote: > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.8-rc3/2.6.8-rc3-mm2/ > - Added a little patch to the CPU scheduler which disables its array > switching. > This is purely experimental and will cause high-priority tasks to starve > lower-priority tasks indefinitely. It is here to determine whether it is > this aspect of the scheduler which caused the staircase scheduler to exhibit > improved throughput in some tests on NUMAq. This patch can't do what the changelog claims it does; if it did, its implementation of yield() would render the yielding process forever unrunnable, plus the active/expired reassignment on sched.c:2672 would have gone away. What is it actually meant to do? -- wli