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Docs/admin-guide/mm/damon/usage: update stats update process for refresh_ms

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DAMOS stats on sysfs was only manually updated.  Recent addition of
'refresh_ms' knob enabled periodic and automated updates of the stats. 
The document for stats update process is not updated for the change,
however.  Update.

Link: https://lkml.kernel.org/r/20260118180305.70023-7-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2026-01-18 10:02:57 -08:00 • committed by Andrew Morton
parent e7df7a0bfc
commit 652fd06d20
1 changed files with 7 additions and 4 deletions
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11
Documentation/admin-guide/mm/damon/usage.rst
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@ -549,10 +549,13 @@ online analysis or tuning of the schemes. Refer to :ref:`design doc
The statistics can be retrieved by reading the files under ``stats`` directory
(``nr_tried``, ``sz_tried``, ``nr_applied``, ``sz_applied``,
``sz_ops_filter_passed``, ``qt_exceeds``, ``nr_snapshots`` and
``max_nr_snapshots``), respectively. The files are not updated in real time,
so you should ask DAMON sysfs interface to update the content of the files for
the stats by writing a special keyword, ``update_schemes_stats`` to the
relevant ``kdamonds/<N>/state`` file.
``max_nr_snapshots``), respectively.
The files are not updated in real time by default. Users should ask DAMON
sysfs interface to periodically update those using ``refresh_ms``, or do a one
time update by writing a special keyword, ``update_schemes_stats`` to the
relevant ``kdamonds/<N>/state`` file. Refer to :ref:`kdamond directory
<sysfs_kdamond>` for more details.
.. _sysfs_schemes_tried_regions: