From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760244AbZCTSjU (ORCPT ); Fri, 20 Mar 2009 14:39:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753047AbZCTSjL (ORCPT ); Fri, 20 Mar 2009 14:39:11 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:33807 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751689AbZCTSjK (ORCPT ); Fri, 20 Mar 2009 14:39:10 -0400 Date: Fri, 20 Mar 2009 19:38:49 +0100 From: Ingo Molnar To: "Paul E. McKenney" Cc: Steven Rostedt , LKML , Thomas Gleixner , Peter Zijlstra , Frederic Weisbecker Subject: Re: [PATCH 0/5] [GIT PULL] updates for tip/tracing/ftrace Message-ID: <20090320183849.GA3657@elte.hu> References: <20090318031423.981603258@goodmis.org> <20090318055924.GA24627@elte.hu> <20090318073903.GA31341@elte.hu> <20090319073357.GA14615@elte.hu> <20090320174331.GH6698@linux.vnet.ibm.com> <20090320183642.GA2070@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090320183642.GA2070@elte.hu> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Ingo Molnar wrote: > > > This looks like it is RCU/stop_machine related. The CPU is > > > stuck in in stop_machine? I see that rcu_torture is running. > > > Does this go away if you turn off rcu_torture? > > > > Grasping at straws... Does Lai's rcu_barrier() fix help? > > which one is that? ok, found it. Will know in about ~24 hours whether it helps. Ingo