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+What:           /sys/kernel/mm/ksm
+Date:           September 2009
+KernelVersion:  2.6.32
+Contact:        Linux memory management mailing list <linux-mm@kvack.org>
+Description:    Interface for Kernel Samepage Merging (KSM)
+
+What:           /sys/kernel/mm/ksm/full_scans
+What:           /sys/kernel/mm/ksm/pages_shared
+What:           /sys/kernel/mm/ksm/pages_sharing
+What:           /sys/kernel/mm/ksm/pages_to_scan
+What:           /sys/kernel/mm/ksm/pages_unshared
+What:           /sys/kernel/mm/ksm/pages_volatile
+What:           /sys/kernel/mm/ksm/run
+What:           /sys/kernel/mm/ksm/sleep_millisecs
+Date:           September 2009
+Contact:        Linux memory management mailing list <linux-mm@kvack.org>
+Description:    Kernel Samepage Merging daemon sysfs interface
+
+                full_scans: how many times all mergeable areas have been
+                scanned.
+
+                pages_shared: how many shared pages are being used.
+
+                pages_sharing: how many more sites are sharing them i.e. how
+                much saved.
+
+                pages_to_scan: how many present pages to scan before ksmd goes
+                to sleep.
+
+                pages_unshared: how many pages unique but repeatedly checked
+                for merging.
+
+                pages_volatile: how many pages changing too fast to be placed
+                in a tree.
+
+                run: write 0 to disable ksm, read 0 while ksm is disabled.
+                        write 1 to run ksm, read 1 while ksm is running.
+                        write 2 to disable ksm and unmerge all its pages.
+
+                sleep_millisecs: how many milliseconds ksm should sleep between
+                scans.
+
+                See Documentation/vm/ksm.txt for more information.
+
+What:           /sys/kernel/mm/ksm/merge_across_nodes
+Date:           January 2013
+KernelVersion:  3.9
+Contact:        Linux memory management mailing list <linux-mm@kvack.org>
+Description:    Control merging pages across different NUMA nodes.
+
+                When it is set to 0 only pages from the same node are merged,
+                otherwise pages from all nodes can be merged together (default).