Document KSM "always" mode kernel cmdline option as well as
corresponding sysfs knob.
Signed-off-by: Oleksandr Natalenko <oleksandr@xxxxxxxxxx>
---
Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
Documentation/admin-guide/mm/ksm.rst | 7 +++++++
2 files changed, 14 insertions(+)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 2b8ee90bb644..510766a3fa05 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2008,6 +2008,13 @@
0: force disabled
1: force enabled
+ ksm_mode=
+ [KNL]
+ Format: [madvise|always]
+ Default: madvise
+ Can be used to control the default behavior of the system
+ with respect to merging anonymous memory.
+
kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
Default is 0 (don't ignore, but inject #GP)
diff --git a/Documentation/admin-guide/mm/ksm.rst b/Documentation/admin-guide/mm/ksm.rst
index 9303786632d1..9af730640da7 100644
--- a/Documentation/admin-guide/mm/ksm.rst
+++ b/Documentation/admin-guide/mm/ksm.rst
@@ -78,6 +78,13 @@ KSM daemon sysfs interface
The KSM daemon is controlled by sysfs files in ``/sys/kernel/mm/ksm/``,
readable by all but writable only by root:
+mode
+ * set madvise to deduplicate only madvised memory
+ * set always to allow deduplicating all the anonymous memory
+ (applies to newly allocated memory only)
+
+ Default: madvise (maintains old behaviour)
+
pages_to_scan
how many pages to scan before ksmd goes to sleep
e.g. ``echo 100 > /sys/kernel/mm/ksm/pages_to_scan``.
--
2.21.0
