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

Aleksa Sarai
2015-02-27T04:17:17Z

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

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2.3.1