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[Po-Hsu Lin <1934429@xxxxxxxxxxxxxxxxxx>]

** Tags removed: ubuntu-ltp
** Tags added: ubuntu-ltp-controllers

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https://bugs.launchpad.net/bugs/1934429

Title:
   memcg_max_usage_in_bytes from controllers in LTP failed with
  memory.memsw.max_usage_in_bytes

Status in ubuntu-kernel-tests:
  New

Bug description:
  Issue found on 5.10.0-1035.36-oem with node spitfire

  With patch for bug 1829979 applied locally via ACT, I can see this
  failure on this kernel:

   startup='Thu Jul 1 15:49:33 2021'
   memcg_max_usage_in_bytes_test 1 TINFO: timeout per run is 0h 5m 0s
   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: Test memory.max_usage_in_bytes
   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: 299052
   memcg_max_usage_in_bytes_test 1 TINFO: Process is still here after warm up: 299052
   memcg_max_usage_in_bytes_test 1 TPASS: memory.max_usage_in_bytes is 4194304-4325376 as expected
   memcg_max_usage_in_bytes_test 2 TINFO: Test memory.memsw.max_usage_in_bytes
   memcg_max_usage_in_bytes_test 2 TINFO: Running memcg_process --mmap-anon -s 4194304
   memcg_max_usage_in_bytes_test 2 TINFO: Warming up pid: 299068
   memcg_max_usage_in_bytes_test 2 TINFO: Process is still here after warm up: 299068
   memcg_max_usage_in_bytes_test 2 TPASS: memory.memsw.max_usage_in_bytes is 4194304-4325376 as expected
   memcg_max_usage_in_bytes_test 3 TINFO: Test reset memory.max_usage_in_bytes
   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: 299084
   memcg_max_usage_in_bytes_test 3 TINFO: Process is still here after warm up: 299084
   memcg_max_usage_in_bytes_test 3 TPASS: memory.max_usage_in_bytes is 4194304-4325376 as expected
   memcg_max_usage_in_bytes_test 3 TPASS: memory.max_usage_in_bytes is 0-131072 as expected 
   memcg_max_usage_in_bytes_test 4 TINFO: Test reset memory.memsw.max_usage_in_bytes 
   memcg_max_usage_in_bytes_test 4 TINFO: Running memcg_process --mmap-anon -s 4194304
   memcg_max_usage_in_bytes_test 4 TINFO: Warming up pid: 299101
   memcg_max_usage_in_bytes_test 4 TINFO: Process is still here after warm up: 299101
   memcg_max_usage_in_bytes_test 4 TFAIL: memory.memsw.max_usage_in_bytes is 4333568, 4194304-4325376 expected
   memcg_max_usage_in_bytes_test 4 TPASS: memory.memsw.max_usage_in_bytes is 0-131072 as expected
   memcg_max_usage_in_bytes_test 5 TINFO: AppArmor enabled, this may affect test results
   memcg_max_usage_in_bytes_test 5 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root) 
   memcg_max_usage_in_bytes_test 5 TINFO: loaded AppArmor profiles: none

   Summary:
   passed 5
   failed 1
   broken 0
   skipped 0
   warnings 0
   tag=memcg_max_usage_in_bytes stime=1625154573 dur=4 exit=exited stat=1 core=no cu=13 cs=15

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