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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19C11C433EF for ; Fri, 26 Nov 2021 12:43:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377709AbhKZMqz (ORCPT ); Fri, 26 Nov 2021 07:46:55 -0500 Received: from mga14.intel.com ([192.55.52.115]:54187 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377237AbhKZMoy (ORCPT ); Fri, 26 Nov 2021 07:44:54 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10179"; a="235898752" X-IronPort-AV: E=Sophos;i="5.87,265,1631602800"; d="scan'208";a="235898752" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2021 04:40:01 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,265,1631602800"; d="scan'208";a="457650719" Received: from lkp-server02.sh.intel.com (HELO 9e1e9f9b3bcb) ([10.239.97.151]) by orsmga003.jf.intel.com with ESMTP; 26 Nov 2021 04:39:58 -0800 Received: from kbuild by 9e1e9f9b3bcb with local (Exim 4.92) (envelope-from ) id 1mqaWE-00086k-4x; Fri, 26 Nov 2021 12:39:58 +0000 Date: Fri, 26 Nov 2021 20:39:03 +0800 From: kernel test robot To: Axel Rasmussen Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List Subject: mm/khugepaged.c:2181:13: warning: stack frame size (3808) exceeds limit (2048) in 'khugepaged_do_scan' Message-ID: <202111262010.UBcefCrE-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a4849f6000e29235a2707f22e39da6b897bb9543 commit: 2b5067a8143e34aa3fa57a20fb8a3c40d905f942 mm: mmap_lock: add tracepoints around lock acquisition date: 12 months ago config: mips-randconfig-r013-20211124 (https://download.01.org/0day-ci/archive/20211126/202111262010.UBcefCrE-lkp@intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2b5067a8143e34aa3fa57a20fb8a3c40d905f942 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2b5067a8143e34aa3fa57a20fb8a3c40d905f942 # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> mm/khugepaged.c:2181:13: warning: stack frame size (3808) exceeds limit (2048) in 'khugepaged_do_scan' [-Wframe-larger-than] static void khugepaged_do_scan(void) ^ 1 warning generated. Assembler messages: Warning: a different -march was already specified, is now octeon vim +/khugepaged_do_scan +2181 mm/khugepaged.c b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2180 b46e756f5e4703 Kirill A. Shutemov 2016-07-26 @2181 static void khugepaged_do_scan(void) b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2182 { b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2183 struct page *hpage = NULL; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2184 unsigned int progress = 0, pass_through_head = 0; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2185 unsigned int pages = khugepaged_pages_to_scan; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2186 bool wait = true; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2187 b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2188 barrier(); /* write khugepaged_pages_to_scan to local stack */ b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2189 a980df33e9351e Kirill A. Shutemov 2020-06-03 2190 lru_add_drain_all(); a980df33e9351e Kirill A. Shutemov 2020-06-03 2191 b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2192 while (progress < pages) { b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2193 if (!khugepaged_prealloc_page(&hpage, &wait)) b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2194 break; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2195 b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2196 cond_resched(); b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2197 b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2198 if (unlikely(kthread_should_stop() || try_to_freeze())) b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2199 break; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2200 b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2201 spin_lock(&khugepaged_mm_lock); b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2202 if (!khugepaged_scan.mm_slot) b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2203 pass_through_head++; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2204 if (khugepaged_has_work() && b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2205 pass_through_head < 2) b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2206 progress += khugepaged_scan_mm_slot(pages - progress, b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2207 &hpage); b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2208 else b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2209 progress = pages; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2210 spin_unlock(&khugepaged_mm_lock); b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2211 } b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2212 b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2213 if (!IS_ERR_OR_NULL(hpage)) b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2214 put_page(hpage); b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2215 } b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2216 :::::: The code at line 2181 was first introduced by commit :::::: b46e756f5e47031c67658ff036e5ffe27062fa43 thp: extract khugepaged from mm/huge_memory.c :::::: TO: Kirill A. Shutemov :::::: CC: Linus Torvalds --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org