[Devel] [RFC PATCH 0/1]

[Pavel Tikhomirov]

In case of single patch cover-letter is not required. Please merge the below description into the patch itself.

Also please don't leave cover-letter subject blank when you use it.

On 11/14/25 20:14, Dmitry Sepp wrote:
> This patch is intended to introduce a basic test set to verify memory.cache
> behavior. I've encountered several limitations while running the tests:
>  - Migration from one group to another is not supported. Page cache size
>    restrictions of the destination group are not applied.
>  - Page cache usage accounting seems to be rather lazy/imprecise. I introduced
>    some "tolerance" of 15% of the maximum allowed page cache size but even
>    after two seconds the reported current value lies outside of the boundaries
>    (usually way below), which causes the test to fail.
> 
> Dmitry Sepp (1):
>   selftests: cgroup: test page cache limiting feature
> 
>  tools/testing/selftests/cgroup/Makefile      |   4 +-
>  tools/testing/selftests/cgroup/test_cache.sh | 254 +++++++++++++++++++
>  tools/testing/selftests/cgroup/touch_pages.c |  97 +++++++
>  3 files changed, 354 insertions(+), 1 deletion(-)
>  create mode 100755 tools/testing/selftests/cgroup/test_cache.sh
>  create mode 100644 tools/testing/selftests/cgroup/touch_pages.c
> 

-- 
Best regards, Pavel Tikhomirov
Senior Software Developer, Virtuozzo.