On s2lp4.lpar.s390x with hirsute:linux (5.11) on sru-20210927 the following 3 failures were observed:
memcg_subgroup_charge 1 TINFO: timeout per run is 0h 5m 0s
memcg_subgroup_charge 1 TINFO: set /dev/memcg/memory.use_hierarchy to 0 failed
memcg_subgroup_charge 1 TINFO: Test that group and subgroup have no relationship
echo: write error: Device or resource busy
memcg_subgroup_charge 1 TFAIL: echo 319488 > memory.limit_in_bytes failed unexpectedly
memcg_subgroup_charge 1 TPASS: echo 589824 > subgroup/memory.limit_in_bytes passed as expected
memcg_subgroup_charge 1 TINFO: Running memcg_process --mmap-anon -s 270336
memcg_subgroup_charge 1 TINFO: Warming up pid: 261626
memcg_subgroup_charge 1 TINFO: Process is still here after warm up: 261626
memcg_subgroup_charge 1 TPASS: rss is 270336 as expected
memcg_subgroup_charge 1 TPASS: rss is 0 as expected
echo: write error: Device or resource busy
memcg_subgroup_charge 2 TFAIL: echo 319488 > memory.limit_in_bytes failed unexpectedly
memcg_subgroup_charge 2 TPASS: echo 319488 > subgroup/memory.limit_in_bytes passed as expected
memcg_subgroup_charge 2 TINFO: Running memcg_process --mmap-anon -s 270336
memcg_subgroup_charge 2 TINFO: Warming up pid: 261657
memcg_subgroup_charge 2 TINFO: Process is still here after warm up: 261657
memcg_subgroup_charge 2 TPASS: rss is 270336 as expected
memcg_subgroup_charge 2 TPASS: rss is 0 as expected
echo: write error: Device or resource busy
memcg_subgroup_charge 3 TFAIL: echo 319488 > memory.limit_in_bytes failed unexpectedly
memcg_subgroup_charge 3 TPASS: echo 0 > subgroup/memory.limit_in_bytes passed as expected
memcg_subgroup_charge 3 TINFO: Running memcg_process --mmap-anon -s 270336
memcg_subgroup_charge 3 TINFO: Warming up pid: 261683
memcg_subgroup_charge 3 TINFO: Process is still here after warm up: 261683
memcg_subgroup_charge 3 TPASS: rss is 270336 as expected
memcg_subgroup_charge 3 TPASS: rss is 0 as expected
memcg_subgroup_charge 4 TINFO: AppArmor enabled, this may affect test results
memcg_subgroup_charge 4 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
memcg_subgroup_charge 4 TINFO: loaded AppArmor profiles: none
