Re: [PATCH v10 6/9] kselftests: cgroup: add freezer controller self-tests

[Naresh Kamboju]

Hi Roman,

Just want to share information here on what we notice on running this test case,

On Fri, 5 Apr 2019 at 23:17, Roman Gushchin <guroan@xxxxxxxxx> wrote:
>
> This patch implements 9 tests for the freezer controller for
> cgroup v2:
...
> 6) ptrace test: the test checks that it's possible to attach to
> a process in a frozen cgroup, get some information and detach, and
> the cgroup will remain frozen.

selftests cgroup test_freezer failed because of the sys entry path not found.
 Cgroup /sys/fs/cgroup/unified/cg_test_ptrace isn't frozen
/sys/fs/cgroup/unified/cg_test_ptrace: isn't_frozen #
# not ok 6 test_cgfreezer_ptrace

This test case fails intermittently.

Test output:
-------------
# selftests cgroup test_freezer
cgroup: test_freezer_ #
# Cgroup /sys/fs/cgroup/unified/cg_test_ptrace isn't frozen
/sys/fs/cgroup/unified/cg_test_ptrace: isn't_frozen #
# ok 1 test_cgfreezer_simple
1: test_cgfreezer_simple_ #
# ok 2 test_cgfreezer_tree
2: test_cgfreezer_tree_ #
# ok 3 test_cgfreezer_forkbomb
3: test_cgfreezer_forkbomb_ #
# ok 4 test_cgfreezer_rmdir
4: test_cgfreezer_rmdir_ #
# ok 5 test_cgfreezer_migrate
5: test_cgfreezer_migrate_ #
# not ok 6 test_cgfreezer_ptrace
ok: 6_test_cgfreezer_ptrace #
# ok 7 test_cgfreezer_stopped
7: test_cgfreezer_stopped_ #
# ok 8 test_cgfreezer_ptraced
8: test_cgfreezer_ptraced_ #
# ok 9 test_cgfreezer_vfork
9: test_cgfreezer_vfork_ #
[FAIL] 3 selftests cgroup test_freezer
selftests: cgroup_test_freezer [FAIL]

Test results link,
https://qa-reports.linaro.org/lkft/linux-mainline-oe/tests/kselftest/cgroup_test_freezer?page=1

- Naresh