From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753741AbeAFVSo (ORCPT + 1 other); Sat, 6 Jan 2018 16:18:44 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:46766 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751915AbeAFVSn (ORCPT ); Sat, 6 Jan 2018 16:18:43 -0500 Date: Sat, 6 Jan 2018 22:18:40 +0100 (CET) From: Thomas Gleixner To: "Paul E. McKenney" cc: LKML , Anna-Maria Gleixner , Sebastian Siewior , Peter Zijlstra , Frederic Weisbecker , Ingo Molnar Subject: Re: [patch 0/4] timer/nohz: Fix timer/nohz woes In-Reply-To: <20180105194150.GA24831@linux.vnet.ibm.com> Message-ID: References: <20171222145111.919609918@linutronix.de> <20171222170907.GJ7829@linux.vnet.ibm.com> <20171224012120.GA4113@linux.vnet.ibm.com> <20171224012924.GA6916@linux.vnet.ibm.com> <20180105194150.GA24831@linux.vnet.ibm.com> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: On Fri, 5 Jan 2018, Paul E. McKenney wrote: > But after more than 1,000 hours of test runs, split roughly evenly > among the above three scenarios, there is no statistically significant > difference in error rate among them. This means that there is some > other bug lurking somewhere, and having the same appearance (lost timer). > Were you guys ever able to reproduce this via rcutorture? No. We'll setup more testing on Monday. Which of the tests fails or at least exposes the highest failure rate? Thanks, tglx