Hi,
thanks for your feedback. I'm sending updated solution that changes task
iteration to be consistent with cgroup_is_populated() check and moving the
responsibility to check PF_EXITING on the consumers of iterator API.

Changes from v1
- v1: https://lore.kernel.org/lkml/20200117151533.12381-1-mkoutny@suse.com/ (local)
- Swap the fixing and refactoring patch (in order to make the fix easier for
  backport)
- Don't introduce tasks lists array because of unnecessarily long access code
- Fix comment in selftest
- I leave the CC:stable on discretion of the maintainer

Michal Koutný (2):
  cgroup: Iterate tasks that did not finish do_exit()
  cgroup: Clean up css_set task traversal

Suren Baghdasaryan (1):
  kselftest/cgroup: add cgroup destruction test

 include/linux/cgroup.h                     |   4 +-
 kernel/cgroup/cgroup.c                     |  60 ++++++-----
 tools/testing/selftests/cgroup/test_core.c | 113 +++++++++++++++++++++
 3 files changed, 146 insertions(+), 31 deletions(-)

-- 
2.24.1


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