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SubjectRe: [PATCH v9 0/7] cgroup/cpuset: Add new cpuset partition type & empty effecitve cpus
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On 12/5/21 13:32, Waiman Long wrote:
> 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.
>
> v7:
> - Simplify the documentation patch (patch 5) as suggested by Tejun.
> - Fix a typo in patch 2 and improper commit log in patch 3.
>
> This patchset includes one bug fix and four enhancements to the cpuset v2 code.
>
> Patch 1: Allow parent to set "cpuset.cpus" that may not be a superset
> of children's "cpuset.cpus" for default hierarchy.
>
> Patch 2: Enable partition with no task to have empty cpuset.cpus.effective.
>
> Patch 3: Refining the features and constraints of a cpuset partition
> clarifying what changes are allowed.
>
> Patch 4: Add a new partition state "isolated" to create a partition
> root without load balancing. This is for handling intermitten workloads
> that have a strict low latency requirement.
>
> Patch 5: Enable the "cpuset.cpus.partition" file to show the reason
> that causes invalid partition like "root invalid (No cpu available
> due to hotplug)".
>
> Patch 6 updates the cgroup-v2.rst file accordingly. Patch 7 adds a new
> cpuset test to test the new cpuset partition code.
>
> Waiman Long (7):
> cgroup/cpuset: Don't let child cpusets restrict parent in default
> hierarchy
> cgroup/cpuset: Allow no-task partition to have empty
> cpuset.cpus.effective
> cgroup/cpuset: Refining features and constraints of a partition
> 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 | 168 +++--
> kernel/cgroup/cpuset.c | 440 +++++++-----
> tools/testing/selftests/cgroup/Makefile | 5 +-
> .../selftests/cgroup/test_cpuset_prs.sh | 667 ++++++++++++++++++
> tools/testing/selftests/cgroup/wait_inotify.c | 87 +++
> 5 files changed, 1142 insertions(+), 225 deletions(-)
> create mode 100755 tools/testing/selftests/cgroup/test_cpuset_prs.sh
> create mode 100644 tools/testing/selftests/cgroup/wait_inotify.c
>
Hi,

Is this patch series good enough or is there other changes you would
still like to make in this series?

Cheers,
Longman

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