From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751166AbdAaIzK (ORCPT ); Tue, 31 Jan 2017 03:55:10 -0500 Received: from mail-wm0-f66.google.com ([74.125.82.66]:34160 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751177AbdAaIy7 (ORCPT ); Tue, 31 Jan 2017 03:54:59 -0500 Date: Tue, 31 Jan 2017 09:54:55 +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: <20170131085455.GB27019@gmail.com> References: <1485588065.4181.7.camel@gmx.de> <20170130115942.GK31613@codeblueprint.co.uk> <1485843569.4423.8.camel@gmx.de> <20170131072839.GA10834@gmail.com> <1485852699.4488.0.camel@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1485852699.4488.0.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 Tue, 2017-01-31 at 08:28 +0100, Ingo Molnar wrote: > > * 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. > > Fast ain't gonna happen, 5bf728f02218 bricked. :-/ Next point would be f9a42e0d58cf I suspect, to establish that Linus's latest kernel is fine. That means it's in one of the ~200 -tip commits - should be bisectable in 8-10 steps from that point on. Thanks, Ingo