[GIT PULL] cgroup changes for v7.2

[GIT PULL] cgroup changes for v7.2

[Tejun Heo]

Hello,

The following changes since commit 4a39eda5fdd867fc39f3c039714dd432cee00268:

  cgroup/cpuset: Reset DL migration state on can_attach() failure (2026-05-10 22:14:49 -1000)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git tags/cgroup-for-7.2

for you to fetch changes up to a99ce697ea5e27b867c9ba4ee55fa5ba3b8d1188:

  cgroup: Migrate tasks to the root css when a controller is rebound (2026-06-02 08:25:29 -1000)

----------------------------------------------------------------
cgroup: Changes for v7.2

- Last cycle deferred css teardown on cgroup removal until the cgroup
  depopulated, so a css is not taken offline while tasks can still
  reference it. Disabling a controller through cgroup.subtree_control
  still had the same problem. This reworks the deferral from per-cgroup
  to per-css so that path is covered too.

- New RDMA controller monitoring files: rdma.peak for per-device peak
  usage and rdma.events / rdma.events.local for resource-limit
  exhaustion. The max-limit parser was rewritten, fixing two input
  parsing bugs.

- cpuset: fix a sched-domain leak on the domain-rebuild failure path and
  skip a redundant hardwall ancestor scan on v2.

- Misc: pair the remaining lockless cgroup.max.* reads with WRITE_ONCE,
  assorted selftest robustness fixes, and doc path corrections.

----------------------------------------------------------------
Chen Wandun (1):
      cgroup/cpuset: Skip hardwall ancestor scan in cpuset v2 in cpuset_current_node_allowed()

Costa Shulyupin (1):
      docs: cgroup: Fix stale source file paths

Guopeng Zhang (2):
      selftests/cgroup: enable memory controller in hugetlb memcg test
      cgroup/cpuset: Free sched domains on rebuild guard failure

Hongfu Li (3):
      selftests/cgroup: Fix incorrect variable check in online_cpus()
      selftests/cgroup: Add NULL check after malloc in cgroup_util.c
      selftests/cgroup: check malloc return value in alloc_anon functions

Ren Tamura (1):
      cgroup: pair max limit READ_ONCE() with WRITE_ONCE()

Tao Cui (8):
      cgroup/rdma: refactor resource parsing with match_table_t/match_token()
      selftests/cgroup: fix child process escaping to parent cleanup in test_cpucg_nice
      selftests/cgroup: fix misleading debug message in test_cgfreezer_time_child
      cgroup/rdma: add rdma.peak for per-device peak usage tracking
      cgroup/rdma: add rdma.events to track resource limit exhaustion
      cgroup/rdma: add rdma.events.local for per-cgroup allocation failure attribution
      cgroup/rdma: document rdma.peak, rdma.events and rdma.events.local
      cgroup/rdma: Drop unnecessary READ_ONCE() on event counters

Tejun Heo (7):
      Merge branch 'for-7.1-fixes' into for-7.2
      cgroup: Inline cgroup_has_tasks() in cgroup.h
      cgroup: Annotate unlocked nr_populated_* accesses with READ_ONCE/WRITE_ONCE
      cgroup: Move populated counters to cgroup_subsys_state
      cgroup: Add per-subsys-css kill_css_finish deferral
      cgroup: Defer kill_css_finish() in cgroup_apply_control_disable()
      cgroup: Migrate tasks to the root css when a controller is rebound

 Documentation/admin-guide/cgroup-v1/cgroups.rst    |   2 +-
 Documentation/admin-guide/cgroup-v1/memcg_test.rst |   2 +-
 Documentation/admin-guide/cgroup-v2.rst            |  53 ++++
 include/linux/cgroup-defs.h                        |  30 +-
 include/linux/cgroup.h                             |  27 +-
 include/linux/cgroup_rdma.h                        |   4 +
 kernel/cgroup/cgroup.c                             | 222 +++++++++------
 kernel/cgroup/cpuset-v1.c                          |   2 +-
 kernel/cgroup/cpuset.c                             |  10 +-
 kernel/cgroup/rdma.c                               | 315 ++++++++++++++++-----
 tools/testing/selftests/cgroup/lib/cgroup_util.c   |   9 +-
 tools/testing/selftests/cgroup/test_cpu.c          |   2 +-
 tools/testing/selftests/cgroup/test_cpuset_prs.sh  |   2 +-
 tools/testing/selftests/cgroup/test_freezer.c      |   2 +-
 .../testing/selftests/cgroup/test_hugetlb_memcg.c  |   8 +
 tools/testing/selftests/cgroup/test_memcontrol.c   |  53 ++--
 16 files changed, 532 insertions(+), 211 deletions(-)

--
tejun