Extend memory cgroup documentation do describe the optional idle page
tracking features, and add the corresponding configuration option.
Signed-off-by: Michel Lespinasse<walken@xxxxxxxxxx>
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -370,3 +370,13 @@ config CLEANCACHE
in a negligible performance hit.
If unsure, say Y to enable cleancache
+
+config KSTALED
+ depends on CGROUP_MEM_RES_CTLR
+ bool "Per-cgroup idle page tracking"
+ help
+ This feature allows the kernel to report the amount of user pages
+ in a cgroup that have not been touched in a given time.
+ This information may be used to size the cgroups and/or for
+ job placement within a compute cluster.
+ See Documentation/cgroups/memory.txt for a more complete description.