From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F11A12C80 for ; Fri, 26 Nov 2021 12:40:01 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10179"; a="299062264" X-IronPort-AV: E=Sophos;i="5.87,265,1631602800"; d="scan'208";a="299062264" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.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> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============1121533580985706731==" MIME-Version: 1.0 From: kernel test robot To: kbuild-all@lists.01.org Subject: mm/khugepaged.c:2181:13: warning: stack frame size (3808) exceeds limit (2048) in 'khugepaged_do_scan' Date: Fri, 26 Nov 2021 20:39:03 +0800 Message-ID: <202111262010.UBcefCrE-lkp@intel.com> List-Id: --===============1121533580985706731== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git = master head: a4849f6000e29235a2707f22e39da6b897bb9543 commit: 2b5067a8143e34aa3fa57a20fb8a3c40d905f942 mm: mmap_lock: add tracepo= ints around lock acquisition date: 12 months ago config: mips-randconfig-r013-20211124 (https://download.01.org/0day-ci/arch= ive/20211126/202111262010.UBcefCrE-lkp(a)intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c4= 5def8a75061203461ab0060c75c864df1c) reproduce (this is a W=3D1 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.gi= t/commit/?id=3D2b5067a8143e34aa3fa57a20fb8a3c40d905f942 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/gi= t/torvalds/linux.git git fetch --no-tags linus master git checkout 2b5067a8143e34aa3fa57a20fb8a3c40d905f942 # save the config file to linux build tree COMPILER_INSTALL_PATH=3D$HOME/0day COMPILER=3Dclang make.cross W=3D= 1 ARCH=3Dmips = 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 =3D= NULL; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2184 unsigned int progress = =3D 0, pass_through_head =3D 0; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2185 unsigned int pages =3D= khugepaged_pages_to_scan; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2186 bool wait =3D true; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2187 = b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2188 barrier(); /* write kh= ugepaged_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 < page= s) { b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2193 if (!khugepaged_preal= loc_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_wo= rk() && b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2205 pass_through_head= < 2) b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2206 progress +=3D khugep= aged_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 =3D pages; b46e756f5e4703 Kirill A. Shutemov 2016-07-26 2210 spin_unlock(&khugepag= ed_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(hp= age)) 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@line 2181 was first introduced by commit :::::: b46e756f5e47031c67658ff036e5ffe27062fa43 thp: extract khugepaged fro= m 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(a)lists.01.org --===============1121533580985706731==--