0001 What: /sys/kernel/mm/ksm
0002 Date: September 2009
0003 KernelVersion: 2.6.32
0004 Contact: Linux memory management mailing list <linux-mm@kvack.org>
0005 Description: Interface for Kernel Samepage Merging (KSM)
0006
0007 What: /sys/kernel/mm/ksm/full_scans
0008 What: /sys/kernel/mm/ksm/pages_shared
0009 What: /sys/kernel/mm/ksm/pages_sharing
0010 What: /sys/kernel/mm/ksm/pages_to_scan
0011 What: /sys/kernel/mm/ksm/pages_unshared
0012 What: /sys/kernel/mm/ksm/pages_volatile
0013 What: /sys/kernel/mm/ksm/run
0014 What: /sys/kernel/mm/ksm/sleep_millisecs
0015 Date: September 2009
0016 Contact: Linux memory management mailing list <linux-mm@kvack.org>
0017 Description: Kernel Samepage Merging daemon sysfs interface
0018
0019 full_scans: how many times all mergeable areas have been
0020 scanned.
0021
0022 pages_shared: how many shared pages are being used.
0023
0024 pages_sharing: how many more sites are sharing them i.e. how
0025 much saved.
0026
0027 pages_to_scan: how many present pages to scan before ksmd goes
0028 to sleep.
0029
0030 pages_unshared: how many pages unique but repeatedly checked
0031 for merging.
0032
0033 pages_volatile: how many pages changing too fast to be placed
0034 in a tree.
0035
0036 run: write 0 to disable ksm, read 0 while ksm is disabled.
0037
0038 - write 1 to run ksm, read 1 while ksm is running.
0039 - write 2 to disable ksm and unmerge all its pages.
0040
0041 sleep_millisecs: how many milliseconds ksm should sleep between
0042 scans.
0043
0044 See Documentation/mm/ksm.rst for more information.
0045
0046 What: /sys/kernel/mm/ksm/merge_across_nodes
0047 Date: January 2013
0048 KernelVersion: 3.9
0049 Contact: Linux memory management mailing list <linux-mm@kvack.org>
0050 Description: Control merging pages across different NUMA nodes.
0051
0052 When it is set to 0 only pages from the same node are merged,
0053 otherwise pages from all nodes can be merged together (default).
