Docs/{ABI,admin-guide}/damon: Update for 'state' sysfs file input keyword, 'commit'

This commit documents the newly added 'state' sysfs file input keyword,
'commit', which allows online tuning of DAMON contexts.

Link: https://lkml.kernel.org/r/20220429160606.127307-13-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon
index fab97ea..08b9df3 100644 (file)
--- a/Documentation/ABI/testing/sysfs-kernel-mm-damon
+++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon
@@ -23,9 +23,10 @@ Date:                Mar 2022
 Contact:       SeongJae Park <sj@kernel.org>
 Description:   Writing 'on' or 'off' to this file makes the kdamond starts or
                stops, respectively.  Reading the file returns the keywords
-               based on the current status.  Writing 'update_schemes_stats' to
-               the file updates contents of schemes stats files of the
-               kdamond.
+               based on the current status.  Writing 'commit' to this file
+               makes the kdamond reads the user inputs in the sysfs files
+               except 'state' again.  Writing 'update_schemes_stats' to the
+               file updates contents of schemes stats files of the kdamond.
 
 What:          /sys/kernel/mm/damon/admin/kdamonds/<K>/pid
 Date:          Mar 2022

diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst
index 9c67311..1bb7b72 100644 (file)
--- a/Documentation/admin-guide/mm/damon/usage.rst
+++ b/Documentation/admin-guide/mm/damon/usage.rst
@@ -121,10 +121,11 @@ In each kdamond directory, two files (``state`` and ``pid``) and one directory
 
 Reading ``state`` returns ``on`` if the kdamond is currently running, or
 ``off`` if it is not running.  Writing ``on`` or ``off`` makes the kdamond be
-in the state.  Writing ``update_schemes_stats`` to ``state`` file updates the
-contents of stats files for each DAMON-based operation scheme of the kdamond.
-For details of the stats, please refer to :ref:`stats section
-<sysfs_schemes_stats>`.
+in the state.  Writing ``commit`` to the ``state`` file makes kdamond reads the
+user inputs in the sysfs files except ``state`` file again.  Writing
+``update_schemes_stats`` to ``state`` file updates the contents of stats files
+for each DAMON-based operation scheme of the kdamond.  For details of the
+stats, please refer to :ref:`stats section <sysfs_schemes_stats>`.
 
 If the state is ``on``, reading ``pid`` shows the pid of the kdamond thread.