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-rw-r--r--Documentation/controllers/memory.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/controllers/memory.txt b/Documentation/controllers/memory.txt
index d71745cc2f0..e1501964df1 100644
--- a/Documentation/controllers/memory.txt
+++ b/Documentation/controllers/memory.txt
@@ -314,6 +314,15 @@ will be charged as a new owner of it.
showing for better debug please see the code for meanings.
+5.3 swappiness
+ Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only.
+
+ Following cgroup's swapiness can't be changed.
+ - root cgroup (uses /proc/sys/vm/swappiness).
+ - a cgroup which uses hierarchy and it has child cgroup.
+ - a cgroup which uses hierarchy and not the root of hierarchy.
+
+
6. Hierarchy support
The memory controller supports a deep hierarchy and hierarchical accounting.