[PATCHv6 0/2] sched/deadline: Walk up cpuset hierarchy to decide root domain when hot-unplug

[Pingfan Liu <piliu@redhat.com>]

This series fixes a deadline bug triggered during CPU hot-removal, which
prevents the CPU from being removed. For details, please refer to the
commit log in [2/2].  In addition, [1/2] exposes the
cpuset_cpus_allowed_locked() interface for use by [2/2].

v5 -> v6:
  Introduce the cpuset_cpus_allowed_locked() variant (thanks to Waiman)
  Use local_cpu_mask_dl to avoid cpumask allocation on the stack (thanks to Juri and Waiman)

v4 -> v5:
  Move the housekeeping part into deadline.c (Thanks for Waiman's suggestion)
  Use cpuset_cpus_allowed() instead of introducing new cpuset function (Thanks for Ridong's suggestion)

Pingfan Liu (2):
  cgroup/cpuset: Introduce cpuset_cpus_allowed_locked()
  sched/deadline: Walk up cpuset hierarchy to decide root domain when
    hot-unplug

 include/linux/cpuset.h  |  1 +
 kernel/cgroup/cpuset.c  | 51 ++++++++++++++++++++++++++------------
 kernel/sched/deadline.c | 54 ++++++++++++++++++++++++++++++++++++-----
 3 files changed, 85 insertions(+), 21 deletions(-)

-- 
2.49.0