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=-10.3 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 13C4EC47082 for ; Mon, 7 Jun 2021 09:18:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF90E61153 for ; Mon, 7 Jun 2021 09:18:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230228AbhFGJUb (ORCPT ); Mon, 7 Jun 2021 05:20:31 -0400 Received: from mga05.intel.com ([192.55.52.43]:38443 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229436AbhFGJUa (ORCPT ); Mon, 7 Jun 2021 05:20:30 -0400 IronPort-SDR: R1ohEh9FHQiiIhqRVwWOc0DQTpJji7sWg7Q46+OZRk6mSWivdBk0xh87ooKfOAzdx5FhgiZata y4LHjNYhX6lw== X-IronPort-AV: E=McAfee;i="6200,9189,10007"; a="290215873" X-IronPort-AV: E=Sophos;i="5.83,254,1616482800"; d="scan'208";a="290215873" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2021 02:18:39 -0700 IronPort-SDR: RAcDO5vQXfQ/TNZWTcCgXV2g/0YpbchXU6OonEikw158rL8bza6AfDIol0xJYHKSWahThplg3W bm7sIYunpmzg== X-IronPort-AV: E=Sophos;i="5.83,254,1616482800"; d="scan'208";a="447421534" Received: from shao2-debian.sh.intel.com (HELO [10.239.13.11]) ([10.239.13.11]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jun 2021 02:18:37 -0700 Subject: Re: [kbuild-all] Re: kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread' To: paulmck@kernel.org, kernel test robot Cc: kbuild-all@lists.01.org, clang-built-linux@googlegroups.com, linux-kernel@vger.kernel.org References: <202106061253.0X2QKyyI-lkp@intel.com> <20210606044926.GJ4397@paulmck-ThinkPad-P17-Gen-1> From: Rong Chen Message-ID: <4696fe3d-a7ad-acae-686e-6295ca327737@intel.com> Date: Mon, 7 Jun 2021 17:18:21 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20210606044926.GJ4397@paulmck-ThinkPad-P17-Gen-1> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/6/21 12:49 PM, Paul E. McKenney wrote: > On Sun, Jun 06, 2021 at 12:19:57PM +0800, kernel test robot wrote: >> Hi Paul, >> >> FYI, the error/warning still remains. >> >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >> head: f5b6eb1e018203913dfefcf6fa988649ad11ad6e >> commit: 7dffe01765d9309b8bd5505503933ec0ec53d192 rcu: Add lockdep_assert_irqs_disabled() to raw_spin_unlock_rcu_node() macros >> date: 5 months ago >> config: powerpc-randconfig-r023-20210606 (attached as .config) >> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 551a697c5cf33275b66add4fc467fcf59084cffb) >> reproduce (this is a W=1 build): >> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross >> chmod +x ~/bin/make.cross >> # install powerpc cross compiling tool for clang build >> # apt-get install binutils-powerpc-linux-gnu >> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7dffe01765d9309b8bd5505503933ec0ec53d192 >> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git >> git fetch --no-tags linus master >> git checkout 7dffe01765d9309b8bd5505503933ec0ec53d192 >> # save the attached .config to linux build tree >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc >> >> If you fix the issue, kindly add following tag as appropriate >> Reported-by: kernel test robot >> >> All warnings (new ones prefixed by >>): >> >> In file included from kernel/rcu/tree.c:21: >> In file included from include/linux/kernel.h:12: >> In file included from include/linux/bitops.h:29: >> In file included from arch/powerpc/include/asm/bitops.h:62: >> arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined] >> #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory") >> ^ >> :310:9: note: previous definition is here >> #define __lwsync __builtin_ppc_lwsync >> ^ >>>> kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread' [-Wframe-larger-than=] >> static int __noreturn rcu_gp_kthread(void *unused) > Does -rcu commit 2f20de99a63b ("rcu: Make rcu_gp_cleanup() be noinline > for tracing") help? Hi Paul, The stack frame size decreased to 2256 bytes:   kernel/rcu/tree.c:2129:23: warning: stack frame size of 2256 bytes in function 'rcu_gp_kthread' [-Wframe-larger-than=] Best Regards, Rong Chen