Comment 0 for bug 1897560

Test failed with:
 memcg_max_usage_in_bytes_test 1 TFAIL: memory.max_usage_in_bytes is 4325376, 4194304 expected
 memcg_max_usage_in_bytes_test 3 TFAIL: memory.max_usage_in_bytes is 4325376, 4194304 expected
 memcg_max_usage_in_bytes_test 4 TFAIL: memory.max_usage_in_bytes is 131072, 0 expected

 startup='Mon Sep 28 08:33:14 2020'
 memcg_max_usage_in_bytes_test 1 TINFO: Starting test 1
 sh: echo: I/O error
 memcg_max_usage_in_bytes_test 1 TINFO: set /dev/memcg/memory.use_hierarchy to 0 failed
 memcg_max_usage_in_bytes_test 1 TINFO: Running memcg_process --mmap-anon -s 4194304
 memcg_max_usage_in_bytes_test 1 TINFO: Warming up pid: 1401
 memcg_max_usage_in_bytes_test 1 TINFO: Process is still here after warm up: 1401
 memcg_max_usage_in_bytes_test 1 TFAIL: memory.max_usage_in_bytes is 4325376, 4194304 expected
 memcg_max_usage_in_bytes_test 2 TINFO: Starting test 2
 sh: echo: I/O error
 memcg_max_usage_in_bytes_test 2 TINFO: set /dev/memcg/memory.use_hierarchy to 0 failed
 memcg_max_usage_in_bytes_test 2 TCONF: mem+swap is not enabled
 memcg_max_usage_in_bytes_test 3 TINFO: Starting test 3
 sh: echo: I/O error
 memcg_max_usage_in_bytes_test 3 TINFO: set /dev/memcg/memory.use_hierarchy to 0 failed
 memcg_max_usage_in_bytes_test 3 TINFO: Running memcg_process --mmap-anon -s 4194304
 memcg_max_usage_in_bytes_test 3 TINFO: Warming up pid: 1429
 memcg_max_usage_in_bytes_test 3 TINFO: Process is still here after warm up: 1429
 memcg_max_usage_in_bytes_test 3 TFAIL: memory.max_usage_in_bytes is 4325376, 4194304 expected
 memcg_max_usage_in_bytes_test 4 TFAIL: memory.max_usage_in_bytes is 131072, 0 expected
 memcg_max_usage_in_bytes_test 5 TINFO: Starting test 4
 sh: echo: I/O error
 memcg_max_usage_in_bytes_test 5 TINFO: set /dev/memcg/memory.use_hierarchy to 0 failed
 memcg_max_usage_in_bytes_test 5 TCONF: mem+swap is not enabled
 tag=memcg_max_usage_in_bytes stime=1601281994 dur=3 exit=exited stat=33