From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936550AbdCJMpk (ORCPT ); Fri, 10 Mar 2017 07:45:40 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:32829 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935876AbdCJMLb (ORCPT ); Fri, 10 Mar 2017 07:11:31 -0500 Subject: Re: [kbuild-all] [PATCH 6/6] sysctl: Add global tunable mt_page_copy To: Ye Xiaolong , Anshuman Khandual References: <201702172358.xrHUyT1e%fengguang.wu@intel.com> <20170310011239.GF4705@yexl-desktop> Cc: kbuild test robot , haren@linux.vnet.ibm.com, mhocko@suse.com, srikar@linux.vnet.ibm.com, minchan@kernel.org, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, dave.hansen@intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, jglisse@redhat.com, mgorman@suse.de, dan.j.williams@intel.com, zi.yan@cs.rutgers.edu, vbabka@suse.cz, kbuild-all@01.org From: Anshuman Khandual Date: Fri, 10 Mar 2017 17:41:14 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <20170310011239.GF4705@yexl-desktop> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable x-cbid: 17031012-0024-0000-0000-000003B0DB18 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17031012-0025-0000-0000-0000112E4590 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-03-10_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1702020001 definitions=main-1703100101 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/10/2017 06:42 AM, Ye Xiaolong wrote: > On 03/08, Anshuman Khandual wrote: >> On 02/17/2017 09:00 PM, kbuild test robot wrote: >>> Hi Zi, >>> >>> [auto build test ERROR on linus/master] >>> [also build test ERROR on v4.10-rc8 next-20170217] >>> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] >>> >>> url: https://github.com/0day-ci/linux/commits/Anshuman-Khandual/Enable-parallel-page-migration/20170217-200523 >>> config: i386-randconfig-a0-02131010 (attached as .config) >>> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 >> Though I dont have the same compiler, I am unable to reproduce this >> build failure exactly. The build fails but for a different symbol. > I think previous "undefined reference to `mt_page_copy'" error is due to kbuild > bot didn't set CONFIG_MIGRATION (see attached config in original mail) since it > is a randconfig test. If CONFIG_MIGRATION is not set then mm/migrate.c never gets compiled and the symbol 'mt_page_copy' is never exported for kernel/sysctl.c based extern variable to use. Sure, will fix it by keeping all the code in kernel/sysctl.c within CONFIG_MIGRATION config. Thanks for pointing it out.