| What: /sys/kernel/mm/ksm |
| Date: September 2009 |
| KernelVersion: 2.6.32 |
| Contact: Linux memory management mailing list <linux-mm@kvack.org> |
| Description: Interface for Kernel Samepage Merging (KSM) |
| |
| What: /sys/kernel/mm/ksm/full_scans |
| What: /sys/kernel/mm/ksm/pages_shared |
| What: /sys/kernel/mm/ksm/pages_sharing |
| What: /sys/kernel/mm/ksm/pages_to_scan |
| What: /sys/kernel/mm/ksm/pages_unshared |
| What: /sys/kernel/mm/ksm/pages_volatile |
| What: /sys/kernel/mm/ksm/run |
| What: /sys/kernel/mm/ksm/sleep_millisecs |
| Date: September 2009 |
| Contact: Linux memory management mailing list <linux-mm@kvack.org> |
| Description: Kernel Samepage Merging daemon sysfs interface |
| |
| full_scans: how many times all mergeable areas have been |
| scanned. |
| |
| pages_shared: how many shared pages are being used. |
| |
| pages_sharing: how many more sites are sharing them i.e. how |
| much saved. |
| |
| pages_to_scan: how many present pages to scan before ksmd goes |
| to sleep. |
| |
| pages_unshared: how many pages unique but repeatedly checked |
| for merging. |
| |
| pages_volatile: how many pages changing too fast to be placed |
| in a tree. |
| |
| run: write 0 to disable ksm, read 0 while ksm is disabled. |
| |
| - write 1 to run ksm, read 1 while ksm is running. |
| - write 2 to disable ksm and unmerge all its pages. |
| |
| sleep_millisecs: how many milliseconds ksm should sleep between |
| scans. |
| |
| See Documentation/mm/ksm.rst for more information. |
| |
| What: /sys/kernel/mm/ksm/merge_across_nodes |
| Date: January 2013 |
| KernelVersion: 3.9 |
| Contact: Linux memory management mailing list <linux-mm@kvack.org> |
| Description: Control merging pages across different NUMA nodes. |
| |
| When it is set to 0 only pages from the same node are merged, |
| otherwise pages from all nodes can be merged together (default). |
| |
| What: /sys/kernel/mm/ksm/general_profit |
| Date: April 2023 |
| KernelVersion: 6.4 |
| Contact: Linux memory management mailing list <linux-mm@kvack.org> |
| Description: Measure how effective KSM is. |
| general_profit: how effective is KSM. The formula for the |
| calculation is in Documentation/admin-guide/mm/ksm.rst. |
