In containerized environments, knowing which cgroup is contributing incompressible pages to zswap is essential for effective resource management. This series adds a new per-memcg stat 'zswap_incomp' to track incompressible pages, along with a selftest.
Patch 1: Add the per-memcg zswap_incomp stat and documentation Patch 2: Add selftest for the new stat Changes v1 -> v2: https://lore.kernel.org/linux-mm/[email protected]/ - Rename zswpraw/MEMCG_ZSWAP_RAW to zswap_incomp/MEMCG_ZSWAP_INCOMP (Shakeel Butt, Yosry Ahmed) - Drop zswap_is_incomp() helper, keep opencode (size == PAGE_SIZE) with comments explaining the incompressibility check (Yosry Ahmed) - Add documentation in cgroup-v2.rst (Nhat Pham, SeongJae Park) - Add selftest as a separate patch (Nhat Pham) - Add reference link to Chris Li's discussion on the need for per-memcg incompressible page tracking (Nhat Pham) Jiayuan Chen (2): mm: zswap: add per-memcg stat for incompressible pages selftests/cgroup: add test for zswap incompressible pages Documentation/admin-guide/cgroup-v2.rst | 5 ++ include/linux/memcontrol.h | 1 + mm/memcontrol.c | 8 ++ tools/testing/selftests/cgroup/test_zswap.c | 96 +++++++++++++++++++++ 4 files changed, 110 insertions(+) -- 2.43.0
