linux-stable.git/tools/testing/selftests/cgroup, branch linux-5.0.y

selftests: cgroup: fix cleanup path in test_memcg_subtree_control()

2019-05-31T13:45:08+00:00

[ Upstream commit e14d314c7a489f060d6d691866fef5f131281718 ]

Dan reported, that cleanup path in test_memcg_subtree_control()
triggers a static checker warning:
  ./tools/testing/selftests/cgroup/test_memcontrol.c:76 \
  test_memcg_subtree_control()
  error: uninitialized symbol 'child2'.

Fix this by initializing child2 and parent2 variables and
split the cleanup path into few stages.

Signed-off-by: Roman Gushchin 
Fixes: 84092dbcf901 ("selftests: cgroup: add memory controller self-tests")
Reported-by: Dan Carpenter 
Cc: Dan Carpenter 
Cc: Shuah Khan (Samsung OSG) 
Cc: Mike Rapoport 
Signed-off-by: Shuah Khan 
Signed-off-by: Sasha Levin

Add tests for memory.oom.group

2018-09-07T22:36:01+00:00

Add tests for memory.oom.group for the following cases:
- Killing all processes in a leaf cgroup, but leaving the
  parent untouched
- Killing all processes in a parent and leaf cgroup
- Keeping processes marked by OOM_SCORE_ADJ_MIN alive when considered
  for being killed by the group oom killer.

Signed-off-by: Jay Kamat 
Acked-by: Roman Gushchin 
Signed-off-by: Shuah Khan (Samsung OSG)

Fix cg_read_strcmp()

2018-09-07T22:35:51+00:00

Fix a couple issues with cg_read_strcmp(), to improve correctness of
cgroup tests
- Fix cg_read_strcmp() always returning 0 for empty "needle" strings.
Previously, this function read to a size = 1 buffer when comparing
against empty strings, which would lead to cg_read_strcmp() comparing
two empty strings.
- Fix a memory leak in cg_read_strcmp()

Fixes: 84092dbcf901 ("selftests: cgroup: add memory controller self-tests")

Signed-off-by: Jay Kamat 
Acked-by: Roman Gushchin 
Signed-off-by: Shuah Khan (Samsung OSG)

cgroup: kselftests: add test_core to .gitignore

2018-09-06T18:24:47+00:00

Update .gitignore file.

Signed-off-by: Lei Yang 
Signed-off-by: Shuah Khan (Samsung OSG)

selftests: cgroup: add gitignore file

2018-08-09T17:23:32+00:00

Add the executable 'test_memcontrol' to a .gitignore file.

Signed-off-by: Anders Roxell 
Signed-off-by: Shuah Khan (Samsung OSG)

Add cgroup core selftests

2018-08-09T15:12:45+00:00

This commit adds tests for some of the core functionalities
of cgroups v2.

The commit adds tests for some core principles of croup V2 API:

- test_cgcore_internal_process_constraint

  Tests internal process constraint.
  You can't add a pid to a domain parent if a controller is enabled.

- test_cgcore_top_down_constraint_enable

   Tests that you can't enable a controller on a child if it's not enabled
   on the parent.

- test_cgcore_top_down_constraint_disable

  Tests that you can't disable a controller on a parent if it's
  enabled in a child.

- test_cgcore_no_internal_process_constraint_on_threads

  Tests that there's no internal process constrain on threaded cgroups.
  You can add threads/processes on a parent with a controller enabled.

- test_cgcore_parent_becomes_threaded

  Tests that when a child becomes threaded the parent type becomes
  domain threaded.

- test_cgcore_invalid_domain

  In a situation like:

  A (domain threaded) - B (threaded) - C (domain)

  it tests that C can't be used until it is turned into a threaded cgroup.
  The "cgroup.type" file will report "domain (invalid)" in these cases.
  Operations which fail due to invalid topology use EOPNOTSUPP as the errno.

- test_cgcore_populated

  In a situation like:

  A(0) - B(0) - C(1)
         \ D(0)

  It tests that A, B and C's "populated" fields would be 1 while D's 0.
  It tests that after the one process in C is moved to root, A,B and C's
  "populated" fields would flip to "0" and file modified events will
  be generated on the "cgroup.events" files of both cgroups.

Signed-off-by: Claudio Zumbo 
Cc: Shuah Khan 
Cc: Roman Gushchin 
Cc: Tejun Heo 
Cc: kernel-team@fb.com
Acked-by: Tejun Heo 
Reviewed-by: Roman Gushchin 
Signed-off-by: Shuah Khan (Samsung OSG)

kselftest/cgroup: fix a signedness bug

2018-06-07T19:44:30+00:00

"len" needs to be signed for the error handling to work.

Signed-off-by: Dan Carpenter 
Signed-off-by: Shuah Khan (Samsung OSG)

selftests: cgroup/memcontrol: add basic test for socket accounting

2018-05-31T03:28:33+00:00

The test verifies that when there is active TCP connection, the
memory.stat.sock and memory.current values are close.

Signed-off-by: Mike Rapoport 
Acked-by: Roman Gushchin 
Signed-off-by: Shuah Khan (Samsung OSG)

kselftest/cgroup: fix variable dereferenced before check warning

2018-05-30T21:29:07+00:00

cg_name(const char *root, const char *name) is always called with
non-empty root and name arguments, so there is no sense in checking
it in the function body (after using in strlen()).

Signed-off-by: Roman Gushchin 
Reported-by: Dan Carpenter 
Signed-off-by: Shuah Khan (Samsung OSG)

selftests: cgroup/memcontrol: add basic test for swap controls

2018-05-30T21:29:07+00:00

The new test verifies that memory.swap.max and memory.swap.current behave
as expected for simple allocation scenarios

Signed-off-by: Mike Rapoport 
Acked-by: Tejun Heo 
Acked-by: Roman Gushchin 
Signed-off-by: Shuah Khan (Samsung OSG)