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[Tim Whisonant <2040134@xxxxxxxxxxxxxxxxxx>]

Found on focal:linux-gcp 5.4.0-1144.153 on instance n1-standard-64
during 2025.02.10

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https://bugs.launchpad.net/bugs/2040134

Title:
  memcg_move_charge_at_immigrate in ubuntu_ltp_controller flaky with
  TFAIL: cache is 135168, 270336 expected

Status in ubuntu-kernel-tests:
  New

Bug description:
  Issue found with f-gcp 5.4.0-1117.126 on instance e2-highcpu-8

  This is not a regression, test passed on 2nd attempt. This report is
  just for future reference / hinting purpose.

  Test log:
  INFO: Test start time: Sat Oct 21 09:29:20 UTC 2023
  COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 233356     -n 233356  -f /tmp/ltp-RmMRDxkvuK/alltests -l /dev/null  -C /dev/null -T /dev/null
  LOG File: /dev/null
  FAILED COMMAND File: /dev/null
  TCONF COMMAND File: /dev/null
  Running tests.......
  memcg_move_charge_at_immigrate_test 1 TINFO: timeout per run is 0h 5m 0s
  memcg_move_charge_at_immigrate_test 1 TINFO: set /sys/fs/cgroup/memory/memory.use_hierarchy to 0 failed
  memcg_move_charge_at_immigrate_test 1 TINFO: Test disable moving charges
  memcg_move_charge_at_immigrate_test 1 TINFO: Running memcg_process --mmap-anon -s 135168
  memcg_move_charge_at_immigrate_test 1 TINFO: Warming up pid: 233450
  memcg_move_charge_at_immigrate_test 1 TINFO: Process is still here after warm up: 233450
  memcg_move_charge_at_immigrate_test 1 TPASS: rss is 0 as expected
  memcg_move_charge_at_immigrate_test 1 TPASS: cache is 0 as expected
  memcg_move_charge_at_immigrate_test 1 TPASS: rss is 135168 as expected
  memcg_move_charge_at_immigrate_test 1 TPASS: cache is 0 as expected
  memcg_move_charge_at_immigrate_test 2 TINFO: Test move anon
  memcg_move_charge_at_immigrate_test 2 TINFO: Running memcg_process --mmap-anon --shm --mmap-file -s 135168
  memcg_move_charge_at_immigrate_test 2 TINFO: Warming up pid: 233478
  memcg_move_charge_at_immigrate_test 2 TINFO: Process is still here after warm up: 233478
  memcg_move_charge_at_immigrate_test 2 TPASS: rss is 135168 as expected
  memcg_move_charge_at_immigrate_test 2 TPASS: cache is 0 as expected
  memcg_move_charge_at_immigrate_test 2 TPASS: rss is 0 as expected
  memcg_move_charge_at_immigrate_test 2 TFAIL: cache is 135168, 270336 expected
  memcg_move_charge_at_immigrate_test 3 TINFO: Test move file
  memcg_move_charge_at_immigrate_test 3 TINFO: Running memcg_process --mmap-anon --shm --mmap-file -s 135168
  memcg_move_charge_at_immigrate_test 3 TINFO: Warming up pid: 233508
  memcg_move_charge_at_immigrate_test 3 TINFO: Process is still here after warm up: 233508
  memcg_move_charge_at_immigrate_test 3 TPASS: rss is 0 as expected
  memcg_move_charge_at_immigrate_test 3 TPASS: cache is 270336 as expected
  memcg_move_charge_at_immigrate_test 3 TPASS: rss is 135168 as expected
  memcg_move_charge_at_immigrate_test 3 TPASS: cache is 0 as expected
  memcg_move_charge_at_immigrate_test 4 TINFO: Test move anon and file
  memcg_move_charge_at_immigrate_test 4 TINFO: Running memcg_process --mmap-anon --shm -s 135168
  memcg_move_charge_at_immigrate_test 4 TINFO: Warming up pid: 233539
  memcg_move_charge_at_immigrate_test 4 TINFO: Process is still here after warm up: 233539
  memcg_move_charge_at_immigrate_test 4 TPASS: rss is 135168 as expected
  memcg_move_charge_at_immigrate_test 4 TPASS: cache is 135168 as expected
  memcg_move_charge_at_immigrate_test 4 TPASS: rss is 0 as expected
  memcg_move_charge_at_immigrate_test 4 TPASS: cache is 0 as expected
  memcg_move_charge_at_immigrate_test 5 TINFO: AppArmor enabled, this may affect test results
  memcg_move_charge_at_immigrate_test 5 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
  memcg_move_charge_at_immigrate_test 5 TINFO: loaded AppArmor profiles: none

  Summary:
  passed   15
  failed   1
  broken   0
  skipped  0
  warnings 0
  INFO: ltp-pan reported some tests FAIL
  LTP Version: 20230516
  INFO: Test end time: Sat Oct 21 09:29:24 UTC 2023

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