mbox series

[v2,0/4] controllers/memcg: fixes for CPU nodes on newer kernels

Message ID 20210812080242.16972-1-krzysztof.kozlowski@canonical.com
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Series controllers/memcg: fixes for CPU nodes on newer kernels | expand

Message

Krzysztof Kozlowski Aug. 12, 2021, 8:02 a.m. UTC 
Hi,

Changes since v1
================
1. Address Richard's review by echoing the new node-adjusted limit and
   counting nodes in easier way.

Description
===========
Rebased on top of latest master - no other dependencies.

The problem is that since v5.9 kernel, not only per-CPU but also
per-node kernel memory is accounted to group.  Creating a subgroup on
v5.11 kernel on a two-node machine eats ~440 kB by itself in kernel
memory.

The patchset tries to take it into account and adjust the memory limits.
Have in mind however that kernel might change such accounting in the
future.

Best regards,
Krzysztof

Krzysztof Kozlowski (4):
  controllers/memcg: account per-node kernel memory
  controllers/memcg: fix memcg_stat_test on two node machines
  controllers/memcg: fail early to avoid possible false-positives
  controllers/memcg: check status of commands using interface

 .../memcg/functional/memcg_failcnt.sh         |  4 +-
 .../controllers/memcg/functional/memcg_lib.sh | 37 +++++++++++++++++-
 .../memcg_max_usage_in_bytes_test.sh          | 10 ++---
 .../memcg_memsw_limit_in_bytes_test.sh        |  8 ++--
 .../memcg_move_charge_at_immigrate_test.sh    |  4 +-
 .../memcg/functional/memcg_stat_test.sh       | 38 ++++++++++---------
 .../memcg/functional/memcg_subgroup_charge.sh | 14 +++----
 .../functional/memcg_usage_in_bytes_test.sh   |  4 +-
 .../functional/memcg_use_hierarchy_test.sh    | 14 ++++---
 9 files changed, 84 insertions(+), 49 deletions(-)

Comments

Cyril Hrubis Aug. 12, 2021, 11:32 a.m. UTC | #1 
Hi!
Patchset applied, thanks.