From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22CE0C4321D for ; Sat, 18 Aug 2018 10:29:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA78521868 for ; Sat, 18 Aug 2018 10:29:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CA78521868 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gmx.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726546AbeHRNgY (ORCPT ); Sat, 18 Aug 2018 09:36:24 -0400 Received: from mout.gmx.net ([212.227.15.18]:59261 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725918AbeHRNgX (ORCPT ); Sat, 18 Aug 2018 09:36:23 -0400 Received: from homer.simpson.net ([185.146.51.55]) by mail.gmx.com (mrgmx002 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MhRI2-1fULG93pVS-00Mdpa; Sat, 18 Aug 2018 12:29:04 +0200 Message-ID: <1534588142.2516.10.camel@gmx.de> Subject: Re: [BUG v4.14-rt] kernel BUG at /work/rt/stable-rt.git/kernel/sched/core.c:1639! From: Mike Galbraith To: Steven Rostedt , Thomas Gleixner , Sebastian Andrzej Siewior Cc: Julia Cartwright , linux-rt-users , LKML Date: Sat, 18 Aug 2018 12:29:02 +0200 In-Reply-To: <20180817162340.6e8482fd@gandalf.local.home> References: <20180817162340.6e8482fd@gandalf.local.home> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:u1lsHLAQDBP1Mw9BSPmC19cMnXrM1fEFLldRklKEDKYVunkIVqZ dtS25Sx/BYgROIZ3awjCcGX6KQiT8QpM3IUgjMYiQfjUCFsA5hlZ0NaN2ARF1CgbjfhcLaT neiL97vaXxQZMeooK83D4R/suK+gpsw1bfRtZPmLNIW8t0Y0zEldjpJ2SKITzLquvdFzRei FlX/S6qbcSl/2bRE9PfYg== X-UI-Out-Filterresults: notjunk:1;V01:K0:kyEYQtxlunw=:LxCBm9iiha3PVxBuyeBVPl kIRJXp4/OysOxt2rVvFYPzmMb1b4sFvg77QhWcxvLZuh38jg+C0FeKWM6shOjYC3Vu6uKgDQX Qorx1TmxeK2SswkQ4cgJJ2znO+ZI2kskZoNdvv0ZK53O2mYOZ7bqacQL6/YttEr+zkY85dmes eWUDUsaAyMmiyjsXZ/gmt/OnQruuee8oSYhOSb1WiKYKCgZsgXukkgqIacCR79IHYTvsIXvLi HwBqDQhwvXtVD4BxI1ucAKfNFeC0E5Xo9XHefaVKtUUFn0o6CO/hPlVYsZCHV3k6UX5HKUwka 0UOChPcSbrhKN5AbfwT+ZRUWYO5u+dLjxf5NeaHa8QCEY925qPypTzJzSW182kdONueXu0xG2 rIjHFG1fAc5Pe9pM38cxtj1Pp22zRgD65tLHgLkGtxt3OxQbBPyQZ32KGKkdA/CN/R089DRsd RiCzrW7xmOx6FOqrz4xyMVGnBTJXG6igHyFQSmd03XQAXSnjMnuR4ptOBRUv/5pZypjNpKrZv mseI5rnOa2DQcn6mhp3CO7jM2vo+KShIErPmY6+gkgQN0rmUq4j/8J+lR/sfI1MU1jk73oNwc aPRaDAefmZpedI8rAc9gbrhieIabq2XkAxSjhRLhJ+R2ovnECiAuvz0HhOZ197eiHXUyWdXEb HvLyvKiSuhSDEnbBKFuovuO3LDQmQagTjHlqE/hHDc3ajV6aH3BEFm15WnA+dNpir1VHS1TT8 KoluYg1KJERtN2JHeI16fgItgtIV5O6mX7j8DyFJ1hYToED25uOPJzlc5j9aPJJvDzdkYDHJ1 bZ1jE68 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2018-08-17 at 16:23 -0400, Steven Rostedt wrote: > Pulling in stable releases into v4.14-rt I triggered this with my CPU > hotplug test: > > ------------[ cut here ]------------ > kernel BUG at /work/rt/stable-rt.git/kernel/sched/core.c:1639! > invalid opcode: 0000 [#1] PREEMPT SMP PTI > Modules linked in: sunrpc ip6t_REJECT nf_reject_ipv6 nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables uinput snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd shpchp i2c_i801 soundcore floppy i915 drm_kms_helper drm fb_sys_fops sysimgblt sysfillrect syscopyarea i2c_algo_bit iosf_mbi video [last unloaded: speedstep_lib] > CPU: 1 PID: 2944 Comm: mkdumprd Not tainted 4.14.63-test-rt40+ #782 > Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./To be filled by O.E.M., BIOS SDBLI944.86P 05/08/2007 > task: ffff880037888d80 task.stack: ffffc90000538000 > RIP: 0010:select_fallback_rq+0xc3/0x122 I noticed this upstream, and had started hunting for the origin, but had thought that 4.14-rt was OK. Clearly not the case, but it's not 4.14.60.. stable changes interacting badly either, virgin 4.14.59-rt37 just reproduced in a vm clone of my workstation. -Mike