linux-kernel - [linus:master] [selftests/cgroup] 954bacce36: kernel-selftests.cgroup.test_cpu.test_cpucg

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Message-ID: <202508070722.46239e7c-lkp@intel.com>
Date: Thu, 7 Aug 2025 13:52:31 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Shashank Balaji <shashank.mahadasyam@...y.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>, Michal Koutný
	<mkoutny@...e.com>, <cgroups@...r.kernel.org>, <oliver.sang@...el.com>
Subject: [linus:master] [selftests/cgroup]  954bacce36:
 kernel-selftests.cgroup.test_cpu.test_cpucg_max.fail



Hello,


we noticed 954bacce36 is to address "cpu.max tests", however, we found below
two tests can pass on parent, but failed on 954bacce36.

dfe25fbaedfc2a07 954bacce36d976fe472090b5598
---------------- ---------------------------
       fail:runs  %reproduction    fail:runs
           |             |             |
           :6           100%          6:6     kernel-selftests.cgroup.test_cpu.test_cpucg_max.fail
           :6           100%          6:6     kernel-selftests.cgroup.test_cpu.test_cpucg_max_nested.fail


not sure if there are any necessary env setting? thanks


kernel test robot noticed "kernel-selftests.cgroup.test_cpu.test_cpucg_max.fail" on:

commit: 954bacce36d976fe472090b55987df66da00c49b ("selftests/cgroup: fix cpu.max tests")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linux-next/master 84b92a499e7eca54ba1df6f6c6e01766025943f1]

in testcase: kernel-selftests
version: kernel-selftests-x86_64-ae388edd4a8f-1_20250729
with following parameters:

	group: cgroup



config: x86_64-rhel-9.4-kselftests
compiler: gcc-12
test machine: 4 threads 1 sockets Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz (Ivy Bridge) with 8G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)


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 <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202508070722.46239e7c-lkp@intel.com



# timeout set to 300
# selftests: cgroup: test_cpu
# ok 1 test_cpucg_subtree_control
# ok 2 test_cpucg_stats
# ok 3 test_cpucg_nice
# not ok 4 test_cpucg_weight_overprovisioned
# ok 5 test_cpucg_weight_underprovisioned
# not ok 6 test_cpucg_nested_weight_overprovisioned
# ok 7 test_cpucg_nested_weight_underprovisioned
# not ok 8 test_cpucg_max
# not ok 9 test_cpucg_max_nested
not ok 2 selftests: cgroup: test_cpu # exit=1



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250807/202508070722.46239e7c-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki