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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).