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authorTejun Heo <tj@kernel.org>2015-10-15 16:41:53 -0400
committerTejun Heo <tj@kernel.org>2015-10-15 16:41:53 -0400
commitafcf6c8b75444382e0f9996157207ebae34a8848 (patch)
tree6b8b8ccc4a99cfc7e156765c58ab285034980995 /Documentation/cgroups
parent2e91fa7f6d451e3ea9fec999065d2fd199691f9d (diff)
cgroup: add cgroup_subsys->free() method and use it to fix pids controller
pids controller is completely broken in that it uncharges when a task exits allowing zombies to escape resource control. With the recent updates, cgroup core now maintains cgroup association till task free and pids controller can be fixed by uncharging on free instead of exit. This patch adds cgroup_subsys->free() method and update pids controller to use it instead of ->exit() for uncharging. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Aleksa Sarai <cyphar@cyphar.com>
Diffstat (limited to 'Documentation/cgroups')
-rw-r--r--Documentation/cgroups/cgroups.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index f935fac1e73b..c6256ae9885b 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -637,6 +637,10 @@ void exit(struct task_struct *task)
Called during task exit.
+void free(struct task_struct *task)
+
+Called when the task_struct is freed.
+
void bind(struct cgroup *root)
(cgroup_mutex held by caller)