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-rw-r--r--Documentation/cgroups/memory.txt5
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 7781857dc940..b6ed61c95856 100644
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -485,8 +485,9 @@ The feature can be disabled by
# echo 0 > memory.use_hierarchy
-NOTE1: Enabling/disabling will fail if the cgroup already has other
- cgroups created below it.
+NOTE1: Enabling/disabling will fail if either the cgroup already has other
+ cgroups created below it, or if the parent cgroup has use_hierarchy
+ enabled.
NOTE2: When panic_on_oom is set to "2", the whole system will panic in
case of an OOM event in any cgroup.