Commit adc286e6 authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton

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.orgSigned-off-by: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent da878780
......@@ -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
......
......@@ -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.
......
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