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Subject[PATCH v3 0/2] cgroup: add pids subsystem
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This is a further updated version of the nproc v2 patchset[1] from
advice given by Tejun Heo[2]. The main changes include:

* Switching from mm/page_counter (which is a memcg implementation
feature) to a pid-controller-specific hierarchical charge/uncharge
counter with limits implementation using atomic_long_t (which is also
lockless as it is based on page_counter).

* Updates to the user-space interface to allow for the setting of no
limit to the number of pids in a cgroup (-1 == unlimited) as well as
renaming of the files and the removal of nproc.max_limit.

* The controller was renamed to `pids`.

[1]: https://lkml.org/lkml/2015/2/26/787
[2]: https://lkml.org/lkml/2015/3/2/437

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

include/linux/cgroup.h | 9 ++
include/linux/cgroup_subsys.h | 4 +
init/Kconfig | 12 ++
kernel/Makefile | 1 +
kernel/cgroup.c | 80 +++++++++---
kernel/cgroup_pids.c | 281 ++++++++++++++++++++++++++++++++++++++++++
kernel/fork.c | 12 +-
7 files changed, 381 insertions(+), 18 deletions(-)
create mode 100644 kernel/cgroup_pids.c

--
2.3.1



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