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authorSeongJae Park <sj@kernel.org>2022-05-09 18:20:56 -0700
committerAndrew Morton <akpm@linux-foundation.org>2022-05-13 07:20:09 -0700
commitadc286e6bdd39e94f243cb109d73fb422368acd5 (patch)
treef6ebe51772bc0a5fb838043498acbd2d258675d9 /Documentation
parentda87878010e59869d4d27b3c01ecc8ec06ff4a20 (diff)
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-kernel-mm-damon7
-rw-r--r--Documentation/admin-guide/mm/damon/usage.rst9
2 files changed, 9 insertions, 7 deletions
diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon
index fab97ea22569..08b9df323560 100644
--- 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 9c67311a79d8..1bb7b72414b2 100644
--- 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.