[RFC PATCH v1.1 15/16] Docs/admin-guide/mm/damon/usage: document weight sysfs file

[SJ Park <sj@kernel.org>]

Update DAMON usage document for newly added probe weight file.

Signed-off-by: SJ Park <sj@kernel.org>
---
 Documentation/admin-guide/mm/damon/usage.rst | 11 ++++++++---
 Documentation/mm/damon/design.rst            |  5 +++++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst
index b2649ea011f93..da5f9afd08aef 100644
--- a/Documentation/admin-guide/mm/damon/usage.rst
+++ b/Documentation/admin-guide/mm/damon/usage.rst
@@ -73,9 +73,10 @@ comma (",").
     │ │ │ │ │ │ │ intervals_goal/access_bp,aggrs,min_sample_us,max_sample_us
     │ │ │ │ │ │ nr_regions/min,max
     │ │ │ │ │ │ :ref:`probes <damon_usage_sysfs_probes>`/nr_probes
-    │ │ │ │ │ │ │ 0/filters/nr_filters
-    │ │ │ │ │ │ │ │ 0/type,matching,allow,path
-    │ │ │ │ │ │ │ │ ...
+    │ │ │ │ │ │ │ 0/weight
+    │ │ │ │ │ │ │ │ filters/nr_filters
+    │ │ │ │ │ │ │ │ │ 0/type,matching,allow,path
+    │ │ │ │ │ │ │ │ │ ...
     │ │ │ │ │ │ │ ...
     │ │ │ │ │ :ref:`targets <sysfs_targets>`/nr_targets
     │ │ │ │ │ │ :ref:`0 <sysfs_target>`/pid_target,obsolete_target
@@ -286,6 +287,10 @@ In each probe directory, one directory, ``filters`` exists.  The directory
 contains files for installing filters for the probe, that is used to determine
 the data attribute for the probe.
 
+Each probe directory also contains ``weight`` file.  Reading from and writing
+to the file gets and sets the :ref:`attributes-only monitoring
+<damon_design_attrs_only_monitoring>` weight for the attribute of the probe.
+
 In the beginning, ``filters`` directory has only one file, ``nr_filters``.
 Writing a number (``N``) to the file creates the number of child directories
 named ``0`` to ``N-1``.  Each directory represents each filter and works in a
diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst
index 6d79e7d69be84..aed6cb1cf4831 100644
--- a/Documentation/mm/damon/design.rst
+++ b/Documentation/mm/damon/design.rst
@@ -316,6 +316,8 @@ Another way to do this for higher accuracy is using :ref:`DAMOS filter
 information in page level.  But, because it is operated in page level, the
 overhead is proportional to the size of the memory.
 
+.. _damon_design_attrs_only_monitoring:
+
 Data Attributes-only Monitoring
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -336,6 +338,9 @@ automatically turned off.  The access counter (``nr_accesses``) will always be
 zero and not updated.  Hence the mode is called Data Attributes "only"
 monitoring.
 
+Refer to the :ref:`admin guide <damon_usage_sysfs_probes>` to know how users
+can use the mode.
+
 Dynamic Target Space Updates Handling
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-- 
2.47.3