linux-kernel - [PATCH v3 0/5] memcontrol selftests fixups

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Date:   Tue, 24 May 2022 18:29:50 +0200
From:   Michal Koutný <mkoutny@...e.com>
To:     cgroups@...r.kernel.org, linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Shakeel Butt <shakeelb@...gle.com>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Richard Palethorpe <rpalethorpe@...e.de>,
        Muhammad Usama Anjum <usama.anjum@...labora.com>
Subject: [PATCH v3 0/5] memcontrol selftests fixups

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/20220518161859.21565-2-mkoutny@suse.com/)
- rebased on mm-stable 02e34fff195d3a5f67cbb553795dc109a37d1dcf
- collected acked-bys
- proper Fixes: tag

Changes from v1 (https://lore.kernel.org/r/20220513171811.730-1-mkoutny@suse.com/)
- 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

-- 
2.35.3