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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 38072C433FF for ; Tue, 13 Aug 2019 15:49:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 127E5205F4 for ; Tue, 13 Aug 2019 15:49:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728959AbfHMPtu (ORCPT ); Tue, 13 Aug 2019 11:49:50 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:15226 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727942AbfHMPtu (ORCPT ); Tue, 13 Aug 2019 11:49:50 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x7DFXKXP032229 for ; Tue, 13 Aug 2019 11:49:49 -0400 Received: from e11.ny.us.ibm.com (e11.ny.us.ibm.com [129.33.205.201]) by mx0b-001b2d01.pphosted.com with ESMTP id 2uby40b9uq-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 13 Aug 2019 11:49:48 -0400 Received: from localhost by e11.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 13 Aug 2019 16:49:45 +0100 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x7DFnig949086872 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 13 Aug 2019 15:49:44 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7BD27B2068; Tue, 13 Aug 2019 15:49:44 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5FE68B2065; Tue, 13 Aug 2019 15:49:44 +0000 (GMT) Received: from paulmck-ThinkPad-W541 (unknown [9.70.82.154]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 13 Aug 2019 15:49:44 +0000 (GMT) Received: by paulmck-ThinkPad-W541 (Postfix, from userid 1000) id 4272016C1057; Tue, 13 Aug 2019 08:49:45 -0700 (PDT) Date: Tue, 13 Aug 2019 08:49:45 -0700 From: "Paul E. McKenney" To: kbuild test robot Cc: kbuild-all@01.org, linux-kernel@vger.kernel.org Subject: Re: [rcu:dev.2019.08.09a 65/67] ERROR: "tick_nohz_full_running" [kernel/rcu/rcutorture.ko] undefined! Reply-To: paulmck@linux.ibm.com References: <201908131124.dw1rLYdU%lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201908131124.dw1rLYdU%lkp@intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 19081315-2213-0000-0000-000003BB470E X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00011588; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000287; SDB=6.01246274; UDB=6.00657661; IPR=6.01027779; MB=3.00028160; MTD=3.00000008; XFM=3.00000015; UTC=2019-08-13 15:49:46 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19081315-2214-0000-0000-00005FA13275 Message-Id: <20190813154945.GF28441@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-13_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908130159 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 13, 2019 at 11:23:34AM +0800, kbuild test robot wrote: > Hi Paul, > > First bad commit (maybe != root cause): > > tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2019.08.09a > head: 8997cc705c8156fd638c6296c800ceb4f2cd4eb0 > commit: 7bcd11ce830f32631a378ff0e75836f27b202f1b [65/67] squash! idle: Prevent late-arriving interrupts from disrupting offline > config: x86_64-rhel (attached as .config) > compiler: gcc-7 (Debian 7.4.0-10) 7.4.0 > reproduce: > git checkout 7bcd11ce830f32631a378ff0e75836f27b202f1b > # save the attached .config to linux build tree > make ARCH=x86_64 > > If you fix the issue, kindly add following tag > Reported-by: kbuild test robot > > All errors (new ones prefixed by >>): > > >> ERROR: "tick_nohz_full_running" [kernel/rcu/rcutorture.ko] undefined! Given that this commit did not change rcutorture or anything that rcutorture invokes, I am having difficulty seeing how it caused this failure. Or am I missing some indirect series of inline function invocations? Easy enough to add the EXPORT_SYMBOL_GPL() if it is needed! ;-) Thanx, Paul