Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[linux/fpc-iii.git] / Documentation / ABI / testing / sysfs-kernel-mm-ksm
blob73e653ee248160cb5612d620eeeeff5130f07bc6
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)
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
19                 full_scans: how many times all mergeable areas have been
20                 scanned.
22                 pages_shared: how many shared pages are being used.
24                 pages_sharing: how many more sites are sharing them i.e. how
25                 much saved.
27                 pages_to_scan: how many present pages to scan before ksmd goes
28                 to sleep.
30                 pages_unshared: how many pages unique but repeatedly checked
31                 for merging.
33                 pages_volatile: how many pages changing too fast to be placed
34                 in a tree.
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.
40                 sleep_millisecs: how many milliseconds ksm should sleep between
41                 scans.
43                 See Documentation/vm/ksm.txt for more information.
45 What:           /sys/kernel/mm/ksm/merge_across_nodes
46 Date:           January 2013
47 KernelVersion:  3.9
48 Contact:        Linux memory management mailing list <linux-mm@kvack.org>
49 Description:    Control merging pages across different NUMA nodes.
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).