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.
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