| Petr Holasek | f00dc0e | 2013-02-22 16:35:02 -0800 | [diff] [blame] | 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. |
| Mauro Carvalho Chehab | 54a19b4 | 2020-10-30 08:40:50 +0100 | [diff] [blame] | 37 | |
| 38 | - write 1 to run ksm, read 1 while ksm is running. |
| 39 | - write 2 to disable ksm and unmerge all its pages. |
| Petr Holasek | f00dc0e | 2013-02-22 16:35:02 -0800 | [diff] [blame] | 40 | |
| 41 | sleep_millisecs: how many milliseconds ksm should sleep between |
| 42 | scans. |
| 43 | |
| Mike Rapoport | ad56b73 | 2018-03-21 21:22:47 +0200 | [diff] [blame] | 44 | See Documentation/vm/ksm.rst for more information. |
| Petr Holasek | f00dc0e | 2013-02-22 16:35:02 -0800 | [diff] [blame] | 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). |