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Subject[PATCH v7 2/2] Documentation: add sysfs ABI documentation for ksm
Date
This patch adds sysfs documentation for Kernel Samepage Merging (KSM)
including new merge_across_nodes knob.

Signed-off-by: Petr Holasek <pholasek@redhat.com>
---
Documentation/ABI/testing/sysfs-kernel-mm-ksm | 51 +++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-kernel-mm-ksm

diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-ksm b/Documentation/ABI/testing/sysfs-kernel-mm-ksm
new file mode 100644
index 0000000..44384ae
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-kernel-mm-ksm
@@ -0,0 +1,51 @@
+What: /sys/kernel/mm/ksm
+Date: September 2009
+Contact: Linux memory management mailing list <linux-mm@kvack.org>
+Description: /sys/kernel/mm/ksm contains interface of 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/vm/ksm.txt for more information.
+
+What: /sys/kernel/mm/ksm/merge_across_nodes
+Date: December 2012
+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).
--
1.7.11.7


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