[GIT PULL] cgroup: Changes for v7.3

[GIT PULL] cgroup: Changes for v7.3

[Tejun Heo]

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Hello,

The following changes since commit f0e6f20cb52b14c2c441f04e21cef0c95d498cac:

  Merge tag 'ntfs3_for_7.2' of https://github.com/Paragon-Software-Group/linux-ntfs3 (2026-06-24 10:05:53 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git tags/cgroup-for-7.3

for you to fetch changes up to 2d19207f3fc8e08bab3270af2e3835358ab1473a:

  selftests/cgroup: Remove redundant chown in test_cgcore_lesser_ns_open (2026-08-14 08:32:58 -1000)

----------------------------------------------------------------
cgroup: Changes for v7.3

- cpuset:

  - Attach path bug fixes: migrations spanning multiple source or
    destination cpusets were mishandled, most visibly leaving thread
    affinities stale when the controller is disabled in a threaded subtree.
    Configuration writes could also race an in-flight attach and apply stale
    state, and the deadline task count could get corrupted by concurrent
    updates, skewing SCHED_DEADLINE admission decisions.

  - Memory binding bug fixes: which node masks get applied differed between
    the binding update paths, and tasks cloned with CLONE_INTO_CGROUP
    skipped rebinding entirely. Rebinding also now runs once per process
    instead of repeating for every thread sharing the mm.

  - Overhead removals with no behavior change: CPU hotplug iterated tasks of
    cpusets that just inherit the parent's effective masks, and the
    slab-spreading task flag was still being maintained although the SLAB
    allocator that consumed it is long gone.

- Data-race annotations for benign races so that KCSAN reports stay
  meaningful, selftest coverage for the fixes above along with flakiness and
  portability fixes, and documentation corrections.

----------------------------------------------------------------
Guopeng Zhang (3):
      cgroup: Use data_race() for task->flags in task_css_set_check()
      cgroup/cpuset: Use WRITE_ONCE() for shared prs_err updates
      cgroup/cpuset: Remove obsolete PFA_SPREAD_SLAB task flag

Jian Guo (1):
      selftests/cgroup: Remove redundant cg_enter_current() call in test_core

Joe Simmons-Talbott (1):
      selftests/cgroup: Adjust cpu test duration based on HZ

Julia Lawall (1):
      cgroup: drop unneeded semicolon

Manuel Ebner (1):
      docs: cgroup: Fix bracket

Michal Koutný (1):
      selftests/cgroup: Add test for cpuset affinity on controller disable

Rui Qi (2):
      selftests/cgroup: Avoid awk -e in cpuset tests
      selftests/cgroup: Preserve CPU hotplug write errors

Shaojie Sun (3):
      selftests/cgroup: add user_usec sanity check in test_cpucg_nice
      cgroup/cpuset: Add test for partition root invalidation returning wrong CPUs
      selftests/cgroup: Remove redundant chown in test_cgcore_lesser_ns_open

Song Hu (1):
      selftests/cgroup: fix missing TAP output in test_hugetlb_memcg

Sun Shaojie (1):
      cgroup/cpu: document cpu.stat.local and clarify cpu.stat behavior

Tao Cui (2):
      Docs/admin-guide/cgroup-v2: fix delay_nsec unit in io.latency doc
      docs: cgroup-v2: mark memory.pressure and io.pressure as read-write

Waiman Long (14):
      cgroup/cpuset: Avoid unnecessary cpus & mems update in cpuset_hotplug_update_tasks()
      cgroup/cpuset: Rebind/migrate mm only for threadgroup leader in cpuset_update_tasks_nodemask()
      cgroup/cpuset: Make nr_deadline_tasks an atomic_t
      cgroup/cpuset: Fix node inconsistencies between cpuset_update_tasks_nodemask() and cpuset_attach()
      cgroup/cpuset: Prevent race between task attach and cpuset state change
      cgroup/cpuset: Put all task attach related variables into attach_ctx
      cgroup/cpuset: Add a cpuset_reserve_dl_bw() helper
      cgroup/cpuset: Expand the scope of cpuset_can_attach_check()
      cgroup/cpuset: Make attach_ctx.old_cs track task group leader
      cgroup/cpuset: Move mpol_rebind_mm/cpuset_migrate_mm() calls inside cpuset_attach_task()
      cgroup/cpuset: Support multiple source cpusets for cpuset_*attach()
      cgroup/cpuset: Support multiple destination cpusets for cpuset_*attach()
      cgroup/cpuset: Handle the special case of non-moving tasks in cpuset_can_attach()
      selftests/cgroup: Fix minor defects in test_cpuset

Yousef Alhouseen (1):
      tools/cgroup: iocost_monitor: parse help before importing drgn

Zenghui Yu (Huawei) (1):
      cgroup: Fix a typo of the function name in comment

Zhe Liu (1):
      docs: cgroup-v2: fix stale "io" controller introduction

 Documentation/admin-guide/cgroup-v1/cpusets.rst    |  42 +-
 Documentation/admin-guide/cgroup-v1/memcg_test.rst |   2 +-
 Documentation/admin-guide/cgroup-v2.rst            |  50 +-
 include/linux/cgroup-defs.h                        |   2 +-
 include/linux/cgroup.h                             |   2 +-
 include/linux/sched.h                              |   5 -
 kernel/cgroup/cgroup.c                             |   2 +-
 kernel/cgroup/cpuset-internal.h                    |  12 +-
 kernel/cgroup/cpuset-v1.c                          |  13 +-
 kernel/cgroup/cpuset.c                             | 569 +++++++++++++--------
 tools/cgroup/iocost_monitor.py                     |  10 +-
 .../selftests/cgroup/lib/include/cgroup_util.h     |   1 +
 tools/testing/selftests/cgroup/test_core.c         |  12 +-
 tools/testing/selftests/cgroup/test_cpu.c          |  45 +-
 tools/testing/selftests/cgroup/test_cpuset.c       | 247 +++++++++
 tools/testing/selftests/cgroup/test_cpuset_prs.sh  |  24 +-
 .../testing/selftests/cgroup/test_cpuset_v1_hp.sh  |   2 +-
 .../testing/selftests/cgroup/test_hugetlb_memcg.c  |  10 +-
 18 files changed, 747 insertions(+), 303 deletions(-)

-- 
tejun