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-rw-r--r--include/linux/cgroup.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index df354ae079c1..f8a030ced0c7 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -499,6 +499,21 @@ struct cgroup_subsys {
*/
bool __DEPRECATED_clear_css_refs;
+ /*
+ * 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
+ * is broken in some ways - some subsystems ignore hierarchy
+ * completely while others are only implemented half-way.
+ *
+ * It's now disallowed to create nested cgroups if the subsystem is
+ * broken and cgroup core will emit a warning message on such
+ * cases. Eventually, all subsystems will be made properly
+ * hierarchical and this will go away.
+ */
+ bool broken_hierarchy;
+ bool warned_broken_hierarchy;
+
#define MAX_CGROUP_TYPE_NAMELEN 32
const char *name;