Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754723AbcC1GbY (ORCPT ); Mon, 28 Mar 2016 02:31:24 -0400 Received: from [198.137.202.9] ([198.137.202.9]:49480 "EHLO bombadil.infradead.org" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753785AbcC1GbQ (ORCPT ); Mon, 28 Mar 2016 02:31:16 -0400 Date: Mon, 28 Mar 2016 08:28:51 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Jacob Pan , 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: <20160328062851.GE6344@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> <20160327205439.GY6356@twins.programming.kicks-ass.net> <20160327210914.GD4287@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160327210914.GD4287@linux.vnet.ibm.com> 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: 413 Lines: 14 On Sun, Mar 27, 2016 at 02:09:14PM -0700, Paul E. McKenney wrote: > > Does that system have MONITOR/MWAIT errata? > > On the off-chance that this question was also directed at me, Hehe, it wasn't, however, since we're here.. > here is > what I am running on. I am running in a qemu/KVM virtual machine, in > case that matters. Have you actually tried on real proper hardware? Does it still reproduce there?