Mentioned before in lp:1847982 but this is a different issue. Found on bionic/linux-azure-5.4/5.4.0-1058.60~18.04.1 only on Standard_D4s_v3 instance.
Not found at all on previous spin (bionic/linux-azure-5.4/5.4.0-1057.59~18.04.1) and base kernel (focal/linux-azure/5.4.0-1058.60).
Failure:
memcg_subgroup_charge 3 TBROK: timed out on memory.usage_in_bytes
Full log:
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
memcg_subgroup_charge 1 TPASS: echo 303104 > memory.limit_in_bytes passed as expected
memcg_subgroup_charge 1 TPASS: echo 573440 > 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: 30259
memcg_subgroup_charge 1 TINFO: Process is still here after warm up: 30259
memcg_subgroup_charge 1 TPASS: rss is 270336 as expected
memcg_subgroup_charge 1 TPASS: rss is 0 as expected
memcg_subgroup_charge 2 TPASS: echo 303104 > memory.limit_in_bytes passed as expected
memcg_subgroup_charge 2 TPASS: echo 303104 > 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: 30292
memcg_subgroup_charge 2 TINFO: Process is still here after warm up: 30292
memcg_subgroup_charge 2 TPASS: rss is 270336 as expected
memcg_subgroup_charge 2 TPASS: rss is 0 as expected
memcg_subgroup_charge 3 TPASS: echo 303104 > memory.limit_in_bytes passed as expected
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: 30320
memcg_subgroup_charge 3 TINFO: Process is still here after warm up: 30320
memcg_subgroup_charge 3 TBROK: timed out on memory.usage_in_bytes
memcg_subgroup_charge 3 TINFO: AppArmor enabled, this may affect test results
memcg_subgroup_charge 3 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
memcg_subgroup_charge 3 TINFO: loaded AppArmor profiles: none
