v10: - Relax constraints for changes made to "cpuset.cpus" and "cpuset.cpus.partition" as suggested. Now almost all changes are allowed.
v9: - Add a new patch 1 to remove the child cpuset restriction on parent's "cpuset.cpus". - Relax initial root partition entry limitation to allow cpuset.cpus to overlap that of parent's. - An "isolated invalid" displayed type is added to cpuset.cpus.partition. - Resetting partition root to "member" will leave child partition root as invalid. - Update documentation and test accordingly.
v8: - Reorganize the patch series and rationalize the features and constraints of a partition. - Update patch descriptions and documentation accordingly.
This patchset include the following enhancements to the cpuset v2 partition code. 1) Allow partitions that have no task to have empty effective cpus. 2) Relax the constraints on what changes are allowed in cpuset.cpus and cpuset.cpus.partition. However, the partition remain invalid until the constraints of a valid partition root is satisfied. 3) Add a new "isolated" partition type for partitions with no load balancing which is available in v1 but not yet in v2. 4) Allow the reading of cpuset.cpus.partition to include a reason string as to why the partition remain invalid.
In addition, the cgroup-v2.rst documentation file is updated and a self test is added to verify the correctness the partition code.
Waiman Long (8): cgroup/cpuset: Add top_cpuset check in update_tasks_cpumask() cgroup/cpuset: Miscellaneous cleanups & add helper functions cgroup/cpuset: Allow no-task partition to have empty cpuset.cpus.effective cgroup/cpuset: Relax constraints to partition & cpus changes cgroup/cpuset: Add a new isolated cpus.partition type cgroup/cpuset: Show invalid partition reason string cgroup/cpuset: Update description of cpuset.cpus.partition in cgroup-v2.rst kselftest/cgroup: Add cpuset v2 partition root state test
Documentation/admin-guide/cgroup-v2.rst | 145 ++-- kernel/cgroup/cpuset.c | 712 +++++++++++------- tools/testing/selftests/cgroup/Makefile | 5 +- .../selftests/cgroup/test_cpuset_prs.sh | 674 +++++++++++++++++ tools/testing/selftests/cgroup/wait_inotify.c | 87 +++ 5 files changed, 1295 insertions(+), 328 deletions(-) create mode 100755 tools/testing/selftests/cgroup/test_cpuset_prs.sh create mode 100644 tools/testing/selftests/cgroup/wait_inotify.c