1What: /sys/kernel/mm/ksm 2Date: September 2009 3KernelVersion: 2.6.32 4Contact: Linux memory management mailing list <linux-mm@kvack.org> 5Description: Interface for Kernel Samepage Merging (KSM) 6 7What: /sys/kernel/mm/ksm/full_scans 8What: /sys/kernel/mm/ksm/pages_shared 9What: /sys/kernel/mm/ksm/pages_sharing 10What: /sys/kernel/mm/ksm/pages_to_scan 11What: /sys/kernel/mm/ksm/pages_unshared 12What: /sys/kernel/mm/ksm/pages_volatile 13What: /sys/kernel/mm/ksm/run 14What: /sys/kernel/mm/ksm/sleep_millisecs 15Date: September 2009 16Contact: Linux memory management mailing list <linux-mm@kvack.org> 17Description: 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 write 1 to run ksm, read 1 while ksm is running. 38 write 2 to disable ksm and unmerge all its pages. 39 40 sleep_millisecs: how many milliseconds ksm should sleep between 41 scans. 42 43 See Documentation/vm/ksm.rst for more information. 44 45What: /sys/kernel/mm/ksm/merge_across_nodes 46Date: January 2013 47KernelVersion: 3.9 48Contact: Linux memory management mailing list <linux-mm@kvack.org> 49Description: Control merging pages across different NUMA nodes. 50 51 When it is set to 0 only pages from the same node are merged, 52 otherwise pages from all nodes can be merged together (default). 53