[v3,0/4] memcg: introduce per-memcg proactive reclaim

Message

Yosry Ahmed April 8, 2022, 4:57 a.m. UTC

This patch series adds a memory.reclaim proactive reclaim interface.
The rationale behind the interface and how it works are in the first
patch.

---

Changes in V3:
- Fix cg_write() (in patch 2) to properly return -1 if open() fails
  and not fail if len == errno.
- Remove debug printf() in patch 3.

Changes in V2:
- Add the interface to root as well.
- Added a selftest.
- Documented the interface as a nested-keyed interface, which makes
  adding optional arguments in the future easier (see doc updates in the
  first patch).
- Modified the commit message to reflect changes and add a timeout
  argument as a suggested possible extension
- Return -EAGAIN if the kernel fails to reclaim the full requested
  amount.

---

Shakeel Butt (1):
  memcg: introduce per-memcg reclaim interface

Yosry Ahmed (3):
  selftests: cgroup: return the errno of write() in cg_write() on
    failure
  selftests: cgroup: fix alloc_anon_noexit() instantly freeing memory
  selftests: cgroup: add a selftest for memory.reclaim

 Documentation/admin-guide/cgroup-v2.rst       | 21 +++++
 mm/memcontrol.c                               | 37 ++++++++
 tools/testing/selftests/cgroup/cgroup_util.c  | 32 ++++---
 .../selftests/cgroup/test_memcontrol.c        | 93 ++++++++++++++++++-
 4 files changed, 166 insertions(+), 17 deletions(-)