On 2026-01-11 13:03, kernel test robot wrote:
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/[email protected]/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/[email protected]/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 <[email protected]>
| Closes:
https://lore.kernel.org/oe-kbuild-all/[email protected]/
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.
That's percpu_counter_tree_precise_sum which needs to return a "long".
Will fix.
--
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;
I need to change this to "points_min = LONG_MAX". Will fix.
Thanks,
Mathieu
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
