[LTP] [RFC][PATCH 0/1] cgroup_regression_test.sh fix

[Petr Vorel]

Hi Cristian,

I overlooked this cover letter (read the patch [1] via patchwork and didn't expect
cover letter for single patch, I usually put info below additional ---).
> Hi

> while working on this LTP tip (LTP Jan19 REL + fixes):

> 81e28eab1 memcg_stress_test.sh: fix memory usage
> b25c719de memcg_stress_test.sh: Further cleanup + print info
> a6d7d16f4 memcg_stress_test.sh: ported to newlib
> 6a651fe16 controllers/cpuset: cpuset.cpus file doesn't exist which triggers TFAIL
> fa049ec9f controllers/cgroup_regression_test.sh: Fix two issues
> a6a5caef1 (tag: 20190115, LTP_20190115) LTP 20190115

> I realized 'cgroup' testcase is now wrongly reported FAIL even if NO failures
> happens in the sub testcases:


> Running tests.......
> <<<test_start>>>
> tag=cgroup stim[  125.419776] LTP: starting cgroup (            cgroup_regression_test.sh)
> e=1550611029
> cmdline="               cgroup_regression_test.sh"
> contacts=""
> analysis=exit
> <<<test_output>>>
> incrementing stop
> cgroup_regression_test 1 TINFO: timeout per run is 0h 5m 0s
> cgroup_regression_test 1 TPASS: no kernel bug was found
> cgroup_regression_test 2 TPASS: notify_on_release is inherited
> cgroup_regression_test 3 TCONF: CONFIG_SCHED_DEBUG is not enabled
> cgroup_regression_test 4 TCONF: CONFIG_LOCKDEP is not enabled
> cgroup_regression_test 5 TPASS: no kernel bug was found
> cgroup_regression_test 6 TCONF: CONFIG_CGROUP_NS is NOT supported in Kernels >= 3.0
> cgroup_regression_test 7 TPASS: no kernel bug was found for test 1
> [  126.879398] option changes via remount are deprecated (pid=8105 comm=mount)
> cgroup_regression_test 7 TWARN: skip rest of testing due possible oops triggered by reading /proc/sched_debug
> cgroup_regression_test 7 TPASS: no kernel bug was found for test 2
> cgroup_regression_test 8 TPASS: no kernel bug was found
> cgroup_regression_test 9 TPASS: no kernel bug was found
> mkdir: cannot create directory 'cgroup/0': File exists
> cgroup_regression_test 10 TPASS: no kernel bug was found

> Summary:
> passed   8
> failed   0
> skipped  3
> warnings 1
> <<<execution_status>>>
> initiation_status="ok"
> duration=61 termination_type=exited termination_id=36 corefile=no
> cutime=4314 cstime=5792
> <<<test_end>>>
> INFO: ltp-pan reported some tests FAIL
> LTP Version: 20190115



>             Done executing testcases.
>             LTP Version:  20190115



> This seems to be due to the TWARN added in 78bfa7e785e87d5e7e4e6ebd518ca9a67c78a1f3 which leads
> to an exit code interpreted by ltp-pan as failure.
> Is this expected ? An ltp-pan issue ? Is there something wrong in my setup ?
This is maybe surprising, but deliberate behavior.
IMHO this leads to to the fact that TWARN is fewer used than the others.
@metan: Maybe it'd make sense to change TWARN not producing FAIL.

> A possibly trivial patch follows, BUT anyway there still an unresolved problem: in
> the above test run even using TINFO instead of TWARN, I'll have the whole
> cgroup_regression_test.sh test case reported as TCONF, since some of the
> contained sub test cases have been in fact skipped: is there any way to address
> this kind of situation in the LTP framework ? (beside using TINFO everywhere)
> I understand the scenario is tricky: a test case with many sub-testcases that
> could each PASS/FAIL/SKIP. Any thought/guideline on this ?
FAIL is IMHO in TWARN, TFAIL and TBROK.

TCONF is taken as PASS, see:

cgroup_regression_test 1 TINFO: timeout per run is 0h 5m 0s
cgroup_regression_test 1 TPASS: no kernel bug was found
cgroup_regression_test 2 TPASS: notify_on_release is inherited
cgroup_regression_test 3 TPASS: no kernel bug was found
cgroup_regression_test 4 TCONF: CONFIG_LOCKDEP is not enabled
cgroup_regression_test 5 TPASS: no kernel bug was found
cgroup_regression_test 6 TCONF: CONFIG_CGROUP_NS is NOT supported in Kernels >= 3.0
cgroup_regression_test 7 TPASS: no kernel bug was found for test 1
cgroup_regression_test 7 TPASS: no kernel bug was found for test 2
cgroup_regression_test 8 TPASS: no kernel bug was found
cgroup_regression_test 9 TPASS: no kernel bug was found
cgroup_regression_test 10 TPASS: no kernel bug was found

Summary:
passed   9
failed   0
skipped  2
warnings 0
incrementing stop
<<<execution_status>>>
initiation_status="ok"
duration=92 termination_type=exited termination_id=32 corefile=no
cutime=12606 cstime=5151
<<<test_end>>>
INFO: ltp-pan reported all tests PASS


Kind regards,
Petr

[1] https://patchwork.ozlabs.org/patch/1042942/


> Cristian Marussi (1):
>   cgroup_regression_test.sh: Fix TWARN usage

>  testcases/kernel/controllers/cgroup/cgroup_regression_test.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)