From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 73DDD22301; Sun, 11 Jan 2026 18:03:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768154642; cv=none; b=QjblI6QYgxHEMfQacf8WT8bKGe0Cqra4g6OlF6gHbytOLGYEDOyL0GYYBExm1X5DUHKdZ9qGnz9oUG+bz+bLoaGkFmpOLypYZl8hWdu1TjMquG6rcwPZer9z2uxdIMSBwFWKUgIWIg3a+jNGQf/iOFvYrsaK5VhIkZc/pvYVaeU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768154642; c=relaxed/simple; bh=zbTnStaZRGXqT6TfypigN7OHnqv2DHIxSoAC5Gw88yg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jJUBBr74kyoN2dhv2k56PbQFhhgdwBQa0YWa0ZsBPocAgEEI7qcA5wIKnCLpjXqtP2n2zu6XcvhpkbQ2qkpQZfa7SBWNZYC2AZowSkmv6Q51GYdagDEVsBdwWDNykuuJp/fVaFInuYpShK1xISu6AsjNABjvUe7HihBWD/m7xxs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=i42kBWKP; arc=none smtp.client-ip=192.198.163.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="i42kBWKP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1768154638; x=1799690638; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=zbTnStaZRGXqT6TfypigN7OHnqv2DHIxSoAC5Gw88yg=; b=i42kBWKPjkZz60wg96NQ4np0Ou2H8oiJDPekp3L8WbI8YGOVN6jSHk4/ J3sP7evtRezLYVvL5blTP8V4PNs0WsDroUa4whMmWqDJkx6UvH9PJpHpG 2Ch5lenerW31GfLUt0b5r1XHj0ZTgqL+7LPtdZt4NAE7eSFXbNMss6j39 MC0d37AohG0aEur+84InF02wRnyRUC++2hxOrQglW/JRCpk0nTbhWUxSx 9ONDI0XaeFW4R81nLJnRkCO307WQrd5L2ONY7HFIRIXcAqHeYCFppfq0a cXnaFx1jwSxBOoJbDCLmWwpTMlkdnTMJcs9bAqVjGmxRXCN1/S3JI3m20 g==; X-CSE-ConnectionGUID: kXlXjMZDQWarGkAlh5/HwA== X-CSE-MsgGUID: 1Emfh2TmRp+H5Y0LS0wvJw== X-IronPort-AV: E=McAfee;i="6800,10657,11668"; a="68452007" X-IronPort-AV: E=Sophos;i="6.21,219,1763452800"; d="scan'208";a="68452007" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jan 2026 10:03:57 -0800 X-CSE-ConnectionGUID: pCRMPKXFTZmo/M3PkCS/fg== X-CSE-MsgGUID: EucFxaScS++i9cFiaip57w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,219,1763452800"; d="scan'208";a="208441509" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by orviesa004.jf.intel.com with ESMTP; 11 Jan 2026 10:03:51 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vezn1-00000000CbA-48AU; Sun, 11 Jan 2026 18:03:47 +0000 Date: Mon, 12 Jan 2026 02:03:31 +0800 From: kernel test robot To: Mathieu Desnoyers , Andrew Morton Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Linux Memory Management List , linux-kernel@vger.kernel.org, Mathieu Desnoyers , "Paul E. McKenney" , Steven Rostedt , Masami Hiramatsu , Dennis Zhou , Tejun Heo , Christoph Lameter , Martin Liu , David Rientjes , christian.koenig@amd.com, Shakeel Butt , SeongJae Park , Michal Hocko , Johannes Weiner , Sweet Tea Dorminy , Lorenzo Stoakes , "Liam R . Howlett" , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , Christian Brauner , Wei Yang , David Hildenbrand , Miaohe Lin , Al Viro , linux-trace-kernel@vger.kernel.org, Yu Zhao Subject: Re: [PATCH v12 3/3] mm: Implement precise OOM killer task selection Message-ID: <202601120124.RK3AWOwu-lkp@intel.com> References: <20260111150249.1222944-4-mathieu.desnoyers@efficios.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260111150249.1222944-4-mathieu.desnoyers@efficios.com> Hi Mathieu, kernel test robot noticed the following build warnings: [auto build test WARNING on next-20260109] [cannot apply to akpm-mm/mm-everything kees/for-next/execve tip/sched/core linus/master v6.19-rc4 v6.19-rc3 v6.19-rc2 v6.19-rc4] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Mathieu-Desnoyers/lib-Introduce-hierarchical-per-cpu-counters/20260111-231206 base: next-20260109 patch link: https://lore.kernel.org/r/20260111150249.1222944-4-mathieu.desnoyers%40efficios.com patch subject: [PATCH v12 3/3] mm: Implement precise OOM killer task selection config: arm-randconfig-001-20260112 (https://download.01.org/0day-ci/archive/20260112/202601120124.RK3AWOwu-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260112/202601120124.RK3AWOwu-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202601120124.RK3AWOwu-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/fork.c:637:6: warning: format specifies type 'long' but the argument has type 'int' [-Wformat] 635 | pr_alert("BUG: Bad rss-counter state mm:%p type:%s val:%ld Comm:%s Pid:%d\n", | ~~~ | %d 636 | mm, resident_page_types[i], 637 | percpu_counter_tree_precise_sum(&mm->rss_stat[i]), | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:534:35: note: expanded from macro 'pr_alert' 534 | printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) | ~~~ ^~~~~~~~~~~ include/linux/printk.h:511:60: note: expanded from macro 'printk' 511 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) | ~~~ ^~~~~~~~~~~ include/linux/printk.h:483:19: note: expanded from macro 'printk_index_wrap' 483 | _p_func(_fmt, ##__VA_ARGS__); \ | ~~~~ ^~~~~~~~~~~ 1 warning generated. -- >> mm/oom_kill.c:351:6: warning: variable 'points_min' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] 351 | if (oom_task_origin(task)) { | ^~~~~~~~~~~~~~~~~~~~~ mm/oom_kill.c:392:22: note: uninitialized use occurs here 392 | oc->chosen_points = points_min; | ^~~~~~~~~~ mm/oom_kill.c:351:2: note: remove the 'if' if its condition is always false 351 | if (oom_task_origin(task)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ 352 | points = LONG_MAX; | ~~~~~~~~~~~~~~~~~~ 353 | goto select; | ~~~~~~~~~~~~ 354 | } | ~ mm/oom_kill.c:326:25: note: initialize the variable 'points_min' to silence this warning 326 | long points, points_min, points_max; | ^ | = 0 1 warning generated. vim +637 kernel/fork.c 6af8cb80d3a9a6 David Hildenbrand 2025-03-03 625 d70f2a14b72a4b Andrew Morton 2018-01-31 626 static void check_mm(struct mm_struct *mm) d70f2a14b72a4b Andrew Morton 2018-01-31 627 { d70f2a14b72a4b Andrew Morton 2018-01-31 628 int i; d70f2a14b72a4b Andrew Morton 2018-01-31 629 8495f7e6732ed2 Sai Praneeth Prakhya 2019-09-25 630 BUILD_BUG_ON_MSG(ARRAY_SIZE(resident_page_types) != NR_MM_COUNTERS, 8495f7e6732ed2 Sai Praneeth Prakhya 2019-09-25 631 "Please make sure 'struct resident_page_types[]' is updated as well"); 8495f7e6732ed2 Sai Praneeth Prakhya 2019-09-25 632 d70f2a14b72a4b Andrew Morton 2018-01-31 633 for (i = 0; i < NR_MM_COUNTERS; i++) { 25d942f31cc499 Mathieu Desnoyers 2026-01-11 634 if (unlikely(percpu_counter_tree_precise_compare_value(&mm->rss_stat[i], 0) != 0)) 72456781289a6e Mathieu Desnoyers 2026-01-11 635 pr_alert("BUG: Bad rss-counter state mm:%p type:%s val:%ld Comm:%s Pid:%d\n", 25d942f31cc499 Mathieu Desnoyers 2026-01-11 636 mm, resident_page_types[i], 25d942f31cc499 Mathieu Desnoyers 2026-01-11 @637 percpu_counter_tree_precise_sum(&mm->rss_stat[i]), 881388f3433819 Xuanye Liu 2025-07-23 638 current->comm, 881388f3433819 Xuanye Liu 2025-07-23 639 task_pid_nr(current)); 881388f3433819 Xuanye Liu 2025-07-23 640 } d70f2a14b72a4b Andrew Morton 2018-01-31 641 d70f2a14b72a4b Andrew Morton 2018-01-31 642 if (mm_pgtables_bytes(mm)) d70f2a14b72a4b Andrew Morton 2018-01-31 643 pr_alert("BUG: non-zero pgtables_bytes on freeing mm: %ld\n", d70f2a14b72a4b Andrew Morton 2018-01-31 644 mm_pgtables_bytes(mm)); d70f2a14b72a4b Andrew Morton 2018-01-31 645 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki