Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752797AbcC0Uyx (ORCPT ); Sun, 27 Mar 2016 16:54:53 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:44043 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751782AbcC0Uyw (ORCPT ); Sun, 27 Mar 2016 16:54:52 -0400 Date: Sun, 27 Mar 2016 22:54:39 +0200 From: Peter Zijlstra To: Jacob Pan Cc: paulmck@linux.vnet.ibm.com, Josh Triplett , Ross Green , Mathieu Desnoyers , John Stultz , Thomas Gleixner , lkml , Ingo Molnar , Lai Jiangshan , dipankar@in.ibm.com, Andrew Morton , rostedt , David Howells , Eric Dumazet , Darren Hart , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , Oleg Nesterov , pranith kumar , "Chatre, Reinette" Subject: Re: rcu_preempt self-detected stall on CPU from 4.5-rc3, since 3.17 Message-ID: <20160327205439.GY6356@twins.programming.kicks-ass.net> References: <686568926.5862.1456259651418.JavaMail.zimbra@efficios.com> <20160223205522.GT3522@linux.vnet.ibm.com> <20160226005638.GV3522@linux.vnet.ibm.com> <20160318210011.GA571@cloud> <20160318235641.GH4287@linux.vnet.ibm.com> <20160321092230.75f23fa9@yairi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160321092230.75f23fa9@yairi> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 490 Lines: 10 On Mon, Mar 21, 2016 at 09:22:30AM -0700, Jacob Pan wrote: > > > We're seeing a similar stall (~60 seconds) on an x86 development > > > system here. Any luck tracking down the cause of this? If not, any > > > suggestions for traces that might be helpful? > +Reinette, she has the system that can reproduce the issue. I > believe she is having some other problems with it at the moment. But > the .config should be available. Version is v4.5. Does that system have MONITOR/MWAIT errata?