Merge tag 'cgroup-for-7.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - cgroup.kill did not kill a process whose thread group leader had
   exited while other threads still ran, nor those threads once moved to
   another cgroup, letting a process survive its container being killed

 - A cgroup.procs write under favordynmods could migrate a newly forked
   process before fork linked it to its cgroup, corrupting cgroup task
   lists

 - cpuset partition fixes for nested hierarchies: invalidation, revival,
   shrinking and switches between root and isolated could leak isolated
   CPUs, skip or miscompute the housekeeping check, or leave wrong
   effective CPUs:

     - A root partition can no longer be created under an isolated
       parent or stay valid under one, as disabling it could leave no
       housekeeping CPUs

     - Enabling a partition failed when a grandchild held tasks,
       although the parent had none of its own

     - Separately, an allocation racing with a cpuset.mems update could
       drop its mempolicy nodemask and land on the wrong node, and a
       memoryless node in cpuset.mems triggered a spurious "movable
       nodes only" warning

     - Two no-functional-change cleanups of the effective CPU
       computation

* tag 'cgroup-for-7.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (27 commits)
  cgroup/cpuset: Integrate compute_partition_effective_cpumask() into compute_effective_cpumask()
  cgroup/cpuset: Relocate compute_*effective_cpumask() and compute_effective_nodemask()
  cgroup/cpuset: Release invalid isolated CPUs with a shrunk root partition parent
  cgroup/cpuset: Release invalid isolated CPUs in compute_partition_effective_cpumask()
  cgroup/cpuset: Make sure compute_partition_effective_cpumask() is only called for valid partition
  cgroup/cpuset: Prevent recursive call of remote_cpus_update() via update_cpumasks_hier()
  selftests/cgroup: Check for a single range nohz_full CPUs before running test matrix
  cgroup/cpuset: Minor fixes to prstate_housekeeping_conflict()
  cgroup/cpuset: Fix incorrect effective_cpus bug in update_cpumasks_hier()
  cgroup/cpuset: Properly compute effective xcpus in update_parent_effective_cpumask()
  cgroup/cpuset: Find furthest isolated ancestor for invalidated isolated partition
  cgroup: don't kill migrated processes through their exiting threads
  cgroup/cpuset: check effective mems for a movable-only configuration
  cgroup/cpuset: Fix task checking when enabling a partition
  cgroup: serialize migrations of newly forked processes
  selftests/cgroup: test cgroup.kill with an exited thread group leader
  cgroup: fix cgroup.kill for exited thread group leader
  selftests/cgroup: Skip test_cpuset_prs.sh test if some required CPUs are offline
  selftests/cgroup: Add tests for nohz_full housekeeping check
  selftests/cgroup: Add tests for isolcpus housekeeping check
  ...

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