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[Bug 2083220] [NEW] cgroup_fj_function_cpuset and cgroup_fj_stress_cpuset* failed on Jammy with TWARN

To: canonical-ubuntu-qa@xxxxxxxxxxxxxxxxxxx
From: Po-Hsu Lin <2083220@xxxxxxxxxxxxxxxxxx>
Date: Mon, 30 Sep 2024 09:18:59 -0000
Reply-to: Bug 2083220 <2083220@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
Public bug reported:

cgroup_fj_function_cpuset and other 21 cgroup_fj_stress_cpuset* tests
failed on Jammy.

This is because of commit 1204b1d853 "cgroup_fj_common.sh: Disable
cgroup controller in cleanup function" in LTP upstream [1].

Which is trying to set "-cupset" in /sys/fs/cgroup/cgroup.subtree_control with:
  [ "$cgroup_version" = "2" ] && ROD echo "-$subsystem" \> "/sys/fs/cgroup/cgroup.subtree_control"

However this command is not working on Jammy. It will cause a warning and consequently return a non-zero value, make the test being marked as failed:
  cgroup_fj_function 10 TINFO: Removing all ltp subgroups...
  echo: write error: Device or resource busy
  cgroup_fj_function 10 TWARN: echo -cpuset > /sys/fs/cgroup/cgroup.subtree_control failed

We got our fork updated recently in order to cover Oracular. This change got pulled in here.
This is not a regression.

Test log of cgroup_fj_function_cpuset:
INFO: Test start time: Sat Sep 28 02:18:17 UTC 2024
COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 220118     -n 220118  -f /tmp/ltp-qZ5HGIJRuI/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.......
cgroup_fj_function 1 TINFO: Running: cgroup_fj_function.sh cpuset
cgroup_fj_function 1 TINFO: Tested kernel: Linux kt-j-l-gen-5-15-bc2r4d20-u-ltp-controllers-amd64 5.15.0-125-generic #135-Ubuntu SMP Fri Sep 27 13:53:58 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
cgroup_fj_function 1 TINFO: Using /tmp/ltp-qZ5HGIJRuI/LTP_cgroup_fj_function.HFFslnmBXb as tmpdir (ext2/ext3 filesystem)
cgroup_fj_function 1 TINFO: timeout per run is 0h 5m 0s
cgroup_fj_function 1 TINFO: test starts with cgroup version 2
cgroup_fj_function 1 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
cgroup_fj_function 2 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
cgroup_fj_function 3 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
cgroup_fj_function 4 TINFO: Attaching task 220211 to /sys/fs/cgroup/ltp/test-220163/ltp_1
cgroup_fj_function 4 TPASS: Group /sys/fs/cgroup/ltp/test-220163/ltp_1 with task 220211 cannot be removed
cgroup_fj_function 5 TPASS: Dir /sys/fs/cgroup/ltp/test-220163/ltp_1 with subdir 'a' cannot be removed
cgroup_fj_function 6 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
cgroup_fj_function 7 TPASS: Tasks file /sys/fs/cgroup/ltp/test-220163/ltp_1/tasks cannot be removed
cgroup_fj_function 8 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
cgroup_fj_function 9 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
cgroup_fj_function 10 TINFO: Removing all ltp subgroups...
echo: write error: Device or resource busy
cgroup_fj_function 10 TWARN: echo -cpuset > /sys/fs/cgroup/cgroup.subtree_control failed
cgroup_fj_function 10 TINFO: AppArmor enabled, this may affect test results
cgroup_fj_function 10 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
cgroup_fj_function 10 TINFO: loaded AppArmor profiles: none

Summary:
passed   3
failed   0
broken   0
skipped  6
warnings 1
INFO: ltp-pan reported some tests FAIL
LTP Version: 20240524
INFO: Test end time: Sat Sep 28 02:18:17 UTC 2024

Test log of cgroup_fj_stress_cpuset_2_2_none:
INFO: Test start time: Sat Sep 28 02:19:22 UTC 2024
COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 223498     -n 223498  -f /tmp/ltp-Bq9yX6XLjI/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.......
cgroup_fj_stress 1 TINFO: Running: cgroup_fj_stress.sh cpuset 2 2 none
cgroup_fj_stress 1 TINFO: Tested kernel: Linux kt-j-l-gen-5-15-bc2r4d20-u-ltp-controllers-amd64 5.15.0-125-generic #135-Ubuntu SMP Fri Sep 27 13:53:58 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
cgroup_fj_stress 1 TINFO: Using /tmp/ltp-Bq9yX6XLjI/LTP_cgroup_fj_stress.XbG4umRVOa as tmpdir (ext2/ext3 filesystem)
cgroup_fj_stress 1 TINFO: timeout per run is 0h 5m 0s
cgroup_fj_stress 1 TINFO: test starts with cgroup version 2
cgroup_fj_stress 1 TINFO: Creating subgroups ...
cgroup_fj_stress 1 TINFO: ... mkdired 7 times
cgroup_fj_stress 1 TPASS: All done!
cgroup_fj_stress 2 TINFO: Removing all ltp subgroups...
echo: write error: Device or resource busy
cgroup_fj_stress 2 TWARN: echo -cpuset > /sys/fs/cgroup/cgroup.subtree_control failed
cgroup_fj_stress 2 TINFO: AppArmor enabled, this may affect test results
cgroup_fj_stress 2 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
cgroup_fj_stress 2 TINFO: loaded AppArmor profiles: none

Summary:
passed   1
failed   0
broken   0
skipped  0
warnings 1
INFO: ltp-pan reported some tests FAIL
LTP Version: 20240524
INFO: Test end time: Sat Sep 28 02:19:22 UTC 2024


[1] https://github.com/linux-test-
project/ltp/commit/1204b1d853522c1a02ee98af39524e433bb261d6

** Affects: ubuntu-kernel-tests
     Importance: Undecided
         Status: New


** Tags: 5.15 jammy sru-20240930 ubuntu-ltp-controllers

-- 
You received this bug notification because you are a member of Canonical
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https://bugs.launchpad.net/bugs/2083220

Title:
  cgroup_fj_function_cpuset and cgroup_fj_stress_cpuset* failed on Jammy
  with TWARN

Status in ubuntu-kernel-tests:
  New

Bug description:
  cgroup_fj_function_cpuset and other 21 cgroup_fj_stress_cpuset* tests
  failed on Jammy.

  This is because of commit 1204b1d853 "cgroup_fj_common.sh: Disable
  cgroup controller in cleanup function" in LTP upstream [1].

  Which is trying to set "-cupset" in /sys/fs/cgroup/cgroup.subtree_control with:
    [ "$cgroup_version" = "2" ] && ROD echo "-$subsystem" \> "/sys/fs/cgroup/cgroup.subtree_control"

  However this command is not working on Jammy. It will cause a warning and consequently return a non-zero value, make the test being marked as failed:
    cgroup_fj_function 10 TINFO: Removing all ltp subgroups...
    echo: write error: Device or resource busy
    cgroup_fj_function 10 TWARN: echo -cpuset > /sys/fs/cgroup/cgroup.subtree_control failed

  We got our fork updated recently in order to cover Oracular. This change got pulled in here.
  This is not a regression.

  Test log of cgroup_fj_function_cpuset:
  INFO: Test start time: Sat Sep 28 02:18:17 UTC 2024
  COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 220118     -n 220118  -f /tmp/ltp-qZ5HGIJRuI/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.......
  cgroup_fj_function 1 TINFO: Running: cgroup_fj_function.sh cpuset
  cgroup_fj_function 1 TINFO: Tested kernel: Linux kt-j-l-gen-5-15-bc2r4d20-u-ltp-controllers-amd64 5.15.0-125-generic #135-Ubuntu SMP Fri Sep 27 13:53:58 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
  cgroup_fj_function 1 TINFO: Using /tmp/ltp-qZ5HGIJRuI/LTP_cgroup_fj_function.HFFslnmBXb as tmpdir (ext2/ext3 filesystem)
  cgroup_fj_function 1 TINFO: timeout per run is 0h 5m 0s
  cgroup_fj_function 1 TINFO: test starts with cgroup version 2
  cgroup_fj_function 1 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
  cgroup_fj_function 2 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
  cgroup_fj_function 3 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
  cgroup_fj_function 4 TINFO: Attaching task 220211 to /sys/fs/cgroup/ltp/test-220163/ltp_1
  cgroup_fj_function 4 TPASS: Group /sys/fs/cgroup/ltp/test-220163/ltp_1 with task 220211 cannot be removed
  cgroup_fj_function 5 TPASS: Dir /sys/fs/cgroup/ltp/test-220163/ltp_1 with subdir 'a' cannot be removed
  cgroup_fj_function 6 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
  cgroup_fj_function 7 TPASS: Tasks file /sys/fs/cgroup/ltp/test-220163/ltp_1/tasks cannot be removed
  cgroup_fj_function 8 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
  cgroup_fj_function 9 TCONF: Controller mounted on cgroup2 hierarchy, skipping test
  cgroup_fj_function 10 TINFO: Removing all ltp subgroups...
  echo: write error: Device or resource busy
  cgroup_fj_function 10 TWARN: echo -cpuset > /sys/fs/cgroup/cgroup.subtree_control failed
  cgroup_fj_function 10 TINFO: AppArmor enabled, this may affect test results
  cgroup_fj_function 10 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
  cgroup_fj_function 10 TINFO: loaded AppArmor profiles: none

  Summary:
  passed   3
  failed   0
  broken   0
  skipped  6
  warnings 1
  INFO: ltp-pan reported some tests FAIL
  LTP Version: 20240524
  INFO: Test end time: Sat Sep 28 02:18:17 UTC 2024

  Test log of cgroup_fj_stress_cpuset_2_2_none:
  INFO: Test start time: Sat Sep 28 02:19:22 UTC 2024
  COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 223498     -n 223498  -f /tmp/ltp-Bq9yX6XLjI/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.......
  cgroup_fj_stress 1 TINFO: Running: cgroup_fj_stress.sh cpuset 2 2 none
  cgroup_fj_stress 1 TINFO: Tested kernel: Linux kt-j-l-gen-5-15-bc2r4d20-u-ltp-controllers-amd64 5.15.0-125-generic #135-Ubuntu SMP Fri Sep 27 13:53:58 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
  cgroup_fj_stress 1 TINFO: Using /tmp/ltp-Bq9yX6XLjI/LTP_cgroup_fj_stress.XbG4umRVOa as tmpdir (ext2/ext3 filesystem)
  cgroup_fj_stress 1 TINFO: timeout per run is 0h 5m 0s
  cgroup_fj_stress 1 TINFO: test starts with cgroup version 2
  cgroup_fj_stress 1 TINFO: Creating subgroups ...
  cgroup_fj_stress 1 TINFO: ... mkdired 7 times
  cgroup_fj_stress 1 TPASS: All done!
  cgroup_fj_stress 2 TINFO: Removing all ltp subgroups...
  echo: write error: Device or resource busy
  cgroup_fj_stress 2 TWARN: echo -cpuset > /sys/fs/cgroup/cgroup.subtree_control failed
  cgroup_fj_stress 2 TINFO: AppArmor enabled, this may affect test results
  cgroup_fj_stress 2 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
  cgroup_fj_stress 2 TINFO: loaded AppArmor profiles: none

  Summary:
  passed   1
  failed   0
  broken   0
  skipped  0
  warnings 1
  INFO: ltp-pan reported some tests FAIL
  LTP Version: 20240524
  INFO: Test end time: Sat Sep 28 02:19:22 UTC 2024


  [1] https://github.com/linux-test-
  project/ltp/commit/1204b1d853522c1a02ee98af39524e433bb261d6

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Follow ups

[Bug 2083220] Re: cgroup_fj_function_cpuset and cgroup_fj_stress_cpuset* failed on Jammy with TWARN
From: Mehmet Basaran, 2024-11-12
[Bug 2083220] Re: cgroup_fj_function_cpuset and cgroup_fj_stress_cpuset* failed on Jammy with TWARN
From: Po-Hsu Lin, 2024-10-16
[Bug 2083220] Re: cgroup_fj_function_cpuset and cgroup_fj_stress_cpuset* failed on Jammy with TWARN
From: Jian Hui Lee, 2024-10-14