From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754151AbYI3VOq (ORCPT ); Tue, 30 Sep 2008 17:14:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753321AbYI3VO2 (ORCPT ); Tue, 30 Sep 2008 17:14:28 -0400 Received: from zcars04f.nortel.com ([47.129.242.57]:40483 "EHLO zcars04f.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753300AbYI3VO1 (ORCPT ); Tue, 30 Sep 2008 17:14:27 -0400 Message-ID: <48E2969F.9000303@nortel.com> Date: Tue, 30 Sep 2008 15:14:07 -0600 From: "Chris Friesen" User-Agent: Thunderbird 2.0.0.17 (X11/20080914) MIME-Version: 1.0 To: Ingo Molnar CC: Peter Zijlstra , linux-kernel@vger.kernel.org, Steven Rostedt Subject: Re: unpredictability in scheduler test results -- still present References: <48D2DA0D.4060300@nortel.com> <48DA5A84.8030704@nortel.com> <48DACF55.3070209@nortel.com> <20080927200433.GC28937@elte.hu> <48E0F7B9.3040301@nortel.com> <20080930111217.GA21367@elte.hu> In-Reply-To: <20080930111217.GA21367@elte.hu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Sep 2008 21:14:09.0514 (UTC) FILETIME=[7AB294A0:01C92341] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > * Chris Friesen wrote: >> Ingo Molnar wrote: >>> OTOH, what does 'truning on dftrace' exactly mean? Just enabling it in >>> the .config, or also activating it via /debug/tracing/current_tracer? >> Just enabling it in the .config is enough to trigger the behaviour >> change. I'm not explicitly activating any traces. > ok, that would be a clear ftrace bug i guess? It's either an ftrace bug or a fragile load balancer bug. I wonder if it's related somehow to the stop_machine() call in ftrace_dynamic_init()? Chris