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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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260111150249.1222944-4-mathieu.desnoyers@efficios.com> X-Rspamd-Queue-Id: 53DDE120004 X-Stat-Signature: x6ykbi547hw4od4gcco7676sacq4dbxj X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1768154639-149576 X-HE-Meta: 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 qT+e1L/h cLE4CW4++hqWcBSsmufYlgElwjT0DiXZHAFxChmV8dRdyWQ06EcMBW0WxmBZkLsbKlDKuYi2ae6SZhyOfoGkqn2/2ODPVKjLuR78xi+dOyvSpWvuzp8Gwn/d1FFVBFQO5j2i0ZRoHw70q5xi48Viwd9Re48Xzhv5heBiblXbpXH9OXNW0IrPKzYJmIHIGnvWcJxTayQoPmH/gvDGXbbm/vQHBMgE/ZSn9gi0wlyD+UKHo9ixTbtvf3kCgGPFxtqqk5nV2VZ3P9HYLDnzb6msWCjj9b0AFwFgRHjwJuMyQdi33bg80ChhDwDTo4tU8nC3hqPZ+1TH2ZDF36tVXltX1w2UDA4F5pAgQC8pCDDbg4OLoA3MdbiOZ+CuVWs0xVak/A0/Sh5u+KrzV7bOIyACQigNuV55+HC47B2QEZ+DuG13De0UbIFeWpn92brkMfNRtf/1fbbKBFo0urcI+CoNU80wJ9XCzgqn8oXILMU3oQcWuPUc= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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