1 What:		/sys/kernel/mm/ksm
2 Date:		September 2009
3 KernelVersion:	2.6.32
4 Contact:	Linux memory management mailing list <linux-mm@kvack.org>
5 Description:	Interface for Kernel Samepage Merging (KSM)
6 
7 What:		/sys/kernel/mm/ksm/full_scans
8 What:		/sys/kernel/mm/ksm/pages_shared
9 What:		/sys/kernel/mm/ksm/pages_sharing
10 What:		/sys/kernel/mm/ksm/pages_to_scan
11 What:		/sys/kernel/mm/ksm/pages_unshared
12 What:		/sys/kernel/mm/ksm/pages_volatile
13 What:		/sys/kernel/mm/ksm/run
14 What:		/sys/kernel/mm/ksm/sleep_millisecs
15 Date:		September 2009
16 Contact:	Linux memory management mailing list <linux-mm@kvack.org>
17 Description:	Kernel Samepage Merging daemon sysfs interface
18 
19 		full_scans: how many times all mergeable areas have been
20 		scanned.
21 
22 		pages_shared: how many shared pages are being used.
23 
24 		pages_sharing: how many more sites are sharing them i.e. how
25 		much saved.
26 
27 		pages_to_scan: how many present pages to scan before ksmd goes
28 		to sleep.
29 
30 		pages_unshared: how many pages unique but repeatedly checked
31 		for merging.
32 
33 		pages_volatile: how many pages changing too fast to be placed
34 		in a tree.
35 
36 		run: write 0 to disable ksm, read 0 while ksm is disabled.
37 
38 			- write 1 to run ksm, read 1 while ksm is running.
39 			- write 2 to disable ksm and unmerge all its pages.
40 
41 		sleep_millisecs: how many milliseconds ksm should sleep between
42 		scans.
43 
44 		See Documentation/mm/ksm.rst for more information.
45 
46 What:		/sys/kernel/mm/ksm/merge_across_nodes
47 Date:		January 2013
48 KernelVersion:	3.9
49 Contact:	Linux memory management mailing list <linux-mm@kvack.org>
50 Description:	Control merging pages across different NUMA nodes.
51 
52 		When it is set to 0 only pages from the same node are merged,
53 		otherwise pages from all nodes can be merged together (default).
54 
55 What:		/sys/kernel/mm/ksm/general_profit
56 Date:		April 2023
57 KernelVersion:  6.4
58 Contact:	Linux memory management mailing list <linux-mm@kvack.org>
59 Description:	Measure how effective KSM is.
60 		general_profit: how effective is KSM. The formula for the
61 		calculation is in Documentation/admin-guide/mm/ksm.rst.
62