Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752344AbYJDF1j (ORCPT ); Sat, 4 Oct 2008 01:27:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751059AbYJDF1b (ORCPT ); Sat, 4 Oct 2008 01:27:31 -0400 Received: from zcars04e.nortel.com ([47.129.242.56]:54874 "EHLO zcars04e.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751008AbYJDF1a (ORCPT ); Sat, 4 Oct 2008 01:27:30 -0400 Message-ID: <48E6FEB9.8070603@nortel.com> Date: Fri, 03 Oct 2008 23:27:21 -0600 From: "Chris Friesen" User-Agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Steven Rostedt CC: Ingo Molnar , Linux kernel , Peter Zijlstra Subject: Re: [bug report] sched: stop_machine() usage causes load balancer to misbehave References: <48E55FE5.40108@nortel.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 04 Oct 2008 05:27:26.0291 (UTC) FILETIME=[E2FD9A30:01C925E1] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1084 Lines: 30 Steven Rostedt wrote: > On Thu, 2 Oct 2008, Chris Friesen wrote: > > >>I mentioned before that ftrace (specifically the ftraced daemon) seems to be >>interfering with the load balancer. After some experimenting, it appears that >>any regular calls to stop_machine() will end up confusing the load balancer. >> >>As an experiment, I disabled ftraced (which would normally result in correct >>load balancing) but added a single kernel thread which simply runs the >>following loop, where "chrisd2" is a dummy function. > > > > Chris, > > Thanks for looking into this. I don't have an answer for your question, > but I'll work harder to get the MCOUNT_REC working in PPC. > > Does this happen with x86 too? Unfortunately I don't have an x86 box handy for testing...I could probably get some time on a lab machine next week. Chris -- 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/