Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752840AbaLDA7S (ORCPT ); Wed, 3 Dec 2014 19:59:18 -0500 Received: from www.linutronix.de ([62.245.132.108]:56394 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752000AbaLDA7R (ORCPT ); Wed, 3 Dec 2014 19:59:17 -0500 Date: Thu, 4 Dec 2014 01:59:01 +0100 (CET) From: Thomas Gleixner To: Dave Jones cc: Linus Torvalds , Chris Mason , Mike Galbraith , Ingo Molnar , Peter Zijlstra , =?ISO-8859-15?Q?D=E2niel_Fraga?= , Sasha Levin , "Paul E. McKenney" , Linux Kernel Mailing List , John Stultz Subject: Re: frequent lockups in 3.18rc4 In-Reply-To: <20141204002044.GA15239@redhat.com> Message-ID: References: <20141203190045.GB32005@redhat.com> <20141203200906.GA3118@redhat.com> <20141203232115.GA13266@redhat.com> <20141204002044.GA15239@redhat.com> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) 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 On Wed, 3 Dec 2014, Dave Jones wrote: > On Thu, Dec 04, 2014 at 12:49:29AM +0100, Thomas Gleixner wrote: > > > > I just got > > > > > > [ 1472.614433] Clocksource tsc unstable (delta = -26373048906 ns) > > > > > > without any sign of the pr_err above. > > > > Bah. Would have been too simple .... > > > > Could you please run Ingos time-warp test on that machine for a while? > > > > http://people.redhat.com/mingo/time-warp-test/time-warp-test.c > > > > Please change: > > > > - #define TEST_CLOCK 0 > > + #define TEST_CLOCK 1 > > Seems to be 32-bit only, so I built it with -m32. I assume that's ok? I has some _x86_64 ifdeffery, but I'm too tired to stare at that now. 32bit should show the issue as well. > Also, should I run it in isolation, with nothing else going on, > or under load where I see problems ? isolated is usually the best thing as it has the highest density of reads. Thanks, tglx -- 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/