diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index ba1e6eaf4c36..bb9b4dd55889 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -947,6 +947,22 @@ config CGROUP_FREEZER Provides a way to freeze and unfreeze all tasks in a cgroup. +config CGROUP_PIDS + bool "PIDs cgroup subsystem" + help + Provides enforcement of process number limits in the scope of a + cgroup. Any attempt to fork more processes than is allowed in the + cgroup will fail. PIDs are fundamentally a global resource because it + is fairly trivial to reach PID exhaustion before you reach even a + conservative kmemcg limit. As a result, it is possible to grind a + system to halt without being limited by other cgroup policies. The + PIDs cgroup subsystem is designed to stop this from happening. + + It should be noted that organisational operations (such as attaching + to a cgroup hierarchy will *not* be blocked by the PIDs subsystem), + since the PIDs limit only affects a process's ability to fork, not to + attach to a cgroup. + config CGROUP_DEVICE bool "Device controller for cgroups" help |