[v3,0/5] memcontrol selftests fixups

Message

Michal Koutný May 24, 2022, 4:29 p.m. UTC

Hello.

I'm just flushing the patches to make memcontrol selftests check the
events behavior we had consensus about (test_memcg_low fails).

(test_memcg_reclaim, test_memcg_swap_max fail for me now but it's present
even before the refactoring.)

The two bigger changes are:
- adjustment of the protected values to make tests succeed with the given
  tolerance,
- both test_memcg_low and test_memcg_min check protection of memory in
  populated cgroups (actually as per Documentation/admin-guide/cgroup-v2.rst
  memory.min should not apply to empty cgroups, which is not the case
  currently. Therefore I unified tests with the populated case in order to to
  bring more broken tests).

Thanks,
Michal

Changes from v2 (https://lore.kernel.org/r/[e-mail]/)
- rebased on mm-stable 02e34fff195d3a5f67cbb553795dc109a37d1dcf
- collected acked-bys
- proper Fixes: tag

Changes from v1 (https://lore.kernel.org/r/[e-mail]/)
- fixed mis-rebase in compilation fix patch,
- added review, ack tags from v1,
- applied feedback from v1 (Octave script in git tree),
- added one more patch extracting common parts,
- rebased on mm-stable bbe832b9db2e.

Michal Koutný (5):
  selftests: memcg: Fix compilation
  selftests: memcg: Expect no low events in unprotected sibling
  selftests: memcg: Adjust expected reclaim values of protected cgroups
  selftests: memcg: Remove protection from top level memcg
  selftests: memcg: Factor out common parts of memory.{low,min} tests

 MAINTAINERS                                   |   1 +
 .../selftests/cgroup/memcg_protection.m       |  89 +++++++
 .../selftests/cgroup/test_memcontrol.c        | 247 +++++-------------
 3 files changed, 152 insertions(+), 185 deletions(-)
 create mode 100644 tools/testing/selftests/cgroup/memcg_protection.m