[RFC PATCH v2 0/2] add nproc cgroup subsystem

[Aleksa Sarai]

This is an updated version of the nproc patchset[1], in which the forking
cleanup issue has been resolved by adding can_fork and cancel_fork
callbacks to cgroup subsystems. The can_fork callback is run early
enough that it doesn't get called after the "point of no return" where
the process is exposed (which is when fork) is called, and cancel_fork
is run during the cleanup of copy_process if the fork fails due to other
reasons.

[1]: https://lkml.org/lkml/2015/2/22/204

Aleksa Sarai (2):
  cgroups: allow a cgroup subsystem to reject a fork
  cgroups: add an nproc subsystem

 include/linux/cgroup.h        |   9 ++
 include/linux/cgroup_subsys.h |   4 +
 init/Kconfig                  |  10 +++
 kernel/Makefile               |   1 +
 kernel/cgroup.c               |  80 +++++++++++++----
 kernel/cgroup_nproc.c         | 198 ++++++++++++++++++++++++++++++++++++++++++
 kernel/fork.c                 |  12 ++-
 7 files changed, 296 insertions(+), 18 deletions(-)
 create mode 100644 kernel/cgroup_nproc.c

-- 
2.3.1

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