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

Bug #2040134 reported by Po-Hsu Lin
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubuntu-kernel-tests
New
Undecided
Unassigned

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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