[GIT PULL] cgroup: Changes for v6.12

[Tejun Heo]

The following changes since commit ff0ce721ec213499ec5a532041fb3a1db2dc5ecb:

  cgroup/cpuset: Eliminate unncessary sched domains rebuilds in hotplug (2024-08-05 10:54:25 -1000)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git/ tags/cgroup-for-6.12

for you to fetch changes up to af000ce85293b8e608f696f0c6c280bc3a75887f:

  cgroup: Do not report unavailable v1 controllers in /proc/cgroups (2024-09-10 10:04:28 -1000)

----------------------------------------------------------------
cgroup: Changes for v6.12

- cpuset isolation improvements.

- cpuset cgroup1 support is split into its own file behind the new config
  option CONFIG_CPUSET_V1. This makes it the second controller which makes
  cgroup1 support optional after memcg.

- Handling of unavailable v1 controller handling improved during cgroup1
  mount operations.

- union_find applied to cpuset. It makes code simpler and more efficient.

- Reduce spurious events in pids.events.

- Cleanups and other misc changes.

- Contains a merge of cgroup/for-6.11-fixes to receive cpuset fixes that
  further changes build upon.

----------------------------------------------------------------
Chen Ridong (18):
      cgroup/cpuset: remove child_ecpus_count
      cgroup/cpuset: add decrease attach_in_progress helpers
      cgroup: update some statememt about delegation
      cgroup/cpuset: Correct invalid remote parition prs
      cgroup/cpuset: remove fetch_xcpus
      cgroup/cpuset: remove use_parent_ecpus of cpuset
      cgroup/cpuset: introduce cpuset-v1.c
      cgroup/cpuset: move common code to cpuset-internal.h
      cgroup/cpuset: move memory_pressure to cpuset-v1.c
      cgroup/cpuset: move relax_domain_level to cpuset-v1.c
      cgroup/cpuset: move memory_spread to cpuset-v1.c
      cgroup/cpuset: add callback_lock helper
      cgroup/cpuset: move legacy hotplug update to cpuset-v1.c
      cgroup/cpuset: move validate_change_legacy to cpuset-v1.c
      cgroup/cpuset: move v1 interfaces to cpuset-v1.c
      cgroup/cpuset: rename functions shared between v1 and v2
      cgroup/cpuset: guard cpuset-v1 code under CONFIG_CPUSETS_V1
      cgroup/cpuset: add sefltest for cpuset v1

Michal Koutný (3):
      cgroup/cpuset: Expose cpuset filesystem with cpuset v1 only
      cgroup: Disallow mounting v1 hierarchies without controller implementation
      cgroup: Do not report unavailable v1 controllers in /proc/cgroups

Tejun Heo (1):
      Merge branch 'cgroup/for-6.11-fixes' into cgroup/for-6.12

Waiman Long (7):
      cgroup: Show # of subsystem CSSes in cgroup.stat
      cgroup/cpuset: Check for partition roots with overlapping CPUs
      selftest/cgroup: Add new test cases to test_cpuset_prs.sh
      cgroup: Fix incorrect WARN_ON_ONCE() in css_release_work_fn()
      cgroup/cpuset: Account for boot time isolated CPUs
      selftest/cgroup: Make test_cpuset_prs.sh deal with pre-isolated CPUs
      cgroup/cpuset: Move cpu.h include to cpuset-internal.h

Xavier (3):
      Union-Find: add a new module in kernel library
      cpuset: use Union-Find to optimize the merging of cpumasks
      Documentation: Fix the compilation errors in union_find.rst

Xiu Jianfeng (3):
      cgroup/pids: Avoid spurious event notification
      cgroup/cpuset: Remove cpuset_slab_spread_rotor
      cgroup/pids: Remove unreachable paths of pids_{can,cancel}_fork

 Documentation/admin-guide/cgroup-v2.rst            |   22 +-
 Documentation/core-api/index.rst                   |    1 +
 Documentation/core-api/union_find.rst              |  106 ++
 .../translations/zh_CN/core-api/index.rst          |    1 +
 .../translations/zh_CN/core-api/union_find.rst     |   92 ++
 MAINTAINERS                                        |   12 +
 include/linux/cgroup-defs.h                        |   14 +
 include/linux/cpuset.h                             |   10 +-
 include/linux/sched.h                              |    1 -
 include/linux/union_find.h                         |   41 +
 init/Kconfig                                       |   13 +
 kernel/cgroup/Makefile                             |    1 +
 kernel/cgroup/cgroup-v1.c                          |   17 +-
 kernel/cgroup/cgroup.c                             |   68 +-
 kernel/cgroup/cpuset-internal.h                    |  305 ++++++
 kernel/cgroup/cpuset-v1.c                          |  562 ++++++++++
 kernel/cgroup/cpuset.c                             | 1155 +++-----------------
 kernel/cgroup/pids.c                               |   32 +-
 kernel/fork.c                                      |    1 -
 lib/Makefile                                       |    2 +-
 lib/union_find.c                                   |   49 +
 tools/testing/selftests/cgroup/test_cpuset_prs.sh  |   56 +-
 .../selftests/cgroup/test_cpuset_v1_base.sh        |   77 ++
 23 files changed, 1569 insertions(+), 1069 deletions(-)
 create mode 100644 Documentation/core-api/union_find.rst
 create mode 100644 Documentation/translations/zh_CN/core-api/union_find.rst
 create mode 100644 include/linux/union_find.h
 create mode 100644 kernel/cgroup/cpuset-internal.h
 create mode 100644 kernel/cgroup/cpuset-v1.c
 create mode 100644 lib/union_find.c
 create mode 100755 tools/testing/selftests/cgroup/test_cpuset_v1_base.sh

-- 
tejun