From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751140AbdAaH2v (ORCPT ); Tue, 31 Jan 2017 02:28:51 -0500 Received: from mail-wm0-f67.google.com ([74.125.82.67]:33392 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750925AbdAaH2o (ORCPT ); Tue, 31 Jan 2017 02:28:44 -0500 Date: Tue, 31 Jan 2017 08:28:39 +0100 From: Ingo Molnar To: Mike Galbraith Cc: Matt Fleming , lkml , Peter Zijlstra , Ingo Molnar Subject: Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804 assert_clock_updated.isra.62.part.63+0x25/0x27 Message-ID: <20170131072839.GA10834@gmail.com> References: <1485588065.4181.7.camel@gmx.de> <20170130115942.GK31613@codeblueprint.co.uk> <1485843569.4423.8.camel@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1485843569.4423.8.camel@gmx.de> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Mike Galbraith wrote: > On Mon, 2017-01-30 at 11:59 +0000, Matt Fleming wrote: > > On Sat, 28 Jan, at 08:21:05AM, Mike Galbraith wrote: > > > Running Steven's hotplug stress script in tip.today. Config is > > > NOPREEMPT, tune for maximum build time (enterprise default-ish). > > > > > > [ 75.268049] x86: Booting SMP configuration: > > > [ 75.268052] smpboot: Booting Node 0 Processor 1 APIC 0x2 > > > [ 75.279994] smpboot: Booting Node 0 Processor 2 APIC 0x4 > > > [ 75.294617] smpboot: Booting Node 0 Processor 4 APIC 0x1 > > > [ 75.310698] smpboot: Booting Node 0 Processor 5 APIC 0x3 > > > [ 75.359056] smpboot: CPU 3 is now offline > > > [ 75.415505] smpboot: CPU 4 is now offline > > > [ 75.479985] smpboot: CPU 5 is now offline > > > [ 75.550674] ------------[ cut here ]------------ > > > [ 75.550678] WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804 > > > assert_clock_updated.isra.62.part.63+0x25/0x27 > > > [ 75.550679] rq->clock_update_flags < RQCF_ACT_SKIP > > > > The following patch queued in tip/sched/core should fix this issue: > > Weeell, I'll have to take your word for it, as tip g35669bb7fd46 grew > an early boot brick problem. That's bad - could you perhaps try to bisect it? All recently queued up patches that could cause such problems should be readily bisectable. The bisection might be faster if you first checked whether 5bf728f02218 works - if it does then the bug is in the patches in WIP.x86/boot or WIP.x86/fpu. Thanks, Ingo