1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 651c4363c85e..9d741959f218 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -522,6 +522,18 @@ struct cgroup_subsys {
         bool implicit_on_dfl:1;
 
         /*
+         * If %true, the controller, supports threaded mode on the default
+         * hierarchy.  In a threaded subtree, both process granularity and
+         * no-internal-process constraint are ignored and a threaded
+         * controllers should be able to handle that.
+         *
+         * Note that as an implicit controller is automatically enabled on
+         * all cgroups on the default hierarchy, it should also be
+         * threaded.  implicit && !threaded is not supported.
+         */
+        bool threaded:1;
+
+        /*
          * If %false, this subsystem is properly hierarchical -
          * configuration, resource accounting and restriction on a parent
          * cgroup cover those of its children.  If %true, hierarchy support