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=-10.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 C3CE7C433E6 for ; Wed, 2 Sep 2020 07:53:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A573020826 for ; Wed, 2 Sep 2020 07:53:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726726AbgIBHx3 (ORCPT ); Wed, 2 Sep 2020 03:53:29 -0400 Received: from mga09.intel.com ([134.134.136.24]:6168 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726130AbgIBHxY (ORCPT ); Wed, 2 Sep 2020 03:53:24 -0400 IronPort-SDR: UY2ILCo1TO2A+D3cUmLKMhcIoyyFB7JvCkhmO245T/1LcZqaB5XFUhZPebdVfxGNT5b7nxd741 MW4Y1VjlgI+Q== X-IronPort-AV: E=McAfee;i="6000,8403,9731"; a="158338536" X-IronPort-AV: E=Sophos;i="5.76,381,1592895600"; d="scan'208";a="158338536" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Sep 2020 00:53:22 -0700 IronPort-SDR: 85agHi/zZwdSU7fkFbZoQx29XPaqbBiirB+Fo+FsB6N69zyl/N1FTJ2LUwSGqslJhs+OnjLv/C XvZbmzxC8nBQ== X-IronPort-AV: E=Sophos;i="5.76,381,1592895600"; d="scan'208";a="477536794" Received: from rongch2-mobl.ccr.corp.intel.com (HELO [10.249.175.78]) ([10.249.175.78]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Sep 2020 00:53:16 -0700 Subject: Re: [kthread] 2e7d8748eb: last_state.is_incomplete_run To: qianli zhao Cc: Thomas Gleixner , axboe@kernel.dk, akpm@linux-foundation.org, Felix.Kuehling@amd.com, John Stultz , Stephen Boyd , ben.dooks@codethink.co.uk, bfields@redhat.com, cl@rock-chips.com, linux-kernel@vger.kernel.org, Qianli Zhao , 0day robot , lkp@lists.01.org References: <311159bc826dcca2848344fc277c0069cff0a164.1597207603.git.zhaoqianli@xiaomi.com> <20200820062533.GK18179@shao2-debian> From: "Chen, Rong A" Message-ID: Date: Wed, 2 Sep 2020 15:53:13 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thanks for the input, we do detect this on this commit but not its parent. It may be merged into a wrong base branch or something else that we are not aware of. And it's kind difficulty now for us to provide a reproduction step for kexec issue, we will consider this further. Best Regards, Rong Chen On 8/27/2020 11:49 AM, qianli zhao wrote: > I did not see any exceptions related to my changes,the corresponding > macro CONFIG_DEBUG_OBJECTS_KTHREAD is not enabled,so i think the issue > has nothing to do with my changes > > Thanks > > On Thu, 20 Aug 2020 at 14:26, kernel test robot wrote: >> Greeting, >> >> FYI, we noticed the following commit (built with gcc-9): >> >> commit: 2e7d8748eba7e32150cbd4f57129ea77d1255892 ("[RFC V2] kthread: add object debug support") >> url: https://github.com/0day-ci/linux/commits/Qianli-Zhao/kthread-add-object-debug-support/20200812-131719 >> base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git fb893de323e2d39f7a1f6df425703a2edbdf56ea >> >> in testcase: boot >> >> on test machine: 8 threads Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16G memory >> >> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): >> >> >> >> kernel boot failed by kexec: >> >> user :notice: [32m[ +0.371313] [0m [33mLKP [0m: kexec loading... >> user :notice: [32m[ +0.007118] [0mkexec --noefi -l /opt/rootfs/tmp/pkg/linux/x86_64-rhel-8.3/gcc-9/2e7d8748eba7e32150cbd4f57129ea77d1255892/vmlinuz-5.8.0-12610-g2e7d8748eba7e --initrd=/opt/rootfs/tmp/initrd-concatenated >> >> >> >> >> Thanks, >> Rong Chen >>