diff options
| author | SJ Park <sj@kernel.org> | 2026-07-10 06:46:47 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-08-04 19:18:53 -0700 |
| commit | 3baf78e04b0bc3ed285ff796ba905cd2a3185756 (patch) | |
| tree | 311e6b005b4a9925a15cbcf6dcb8bece66c806e4 | |
| parent | f10489d2ef8e76bbb3eb78c5b963abae3a4a8dc9 (diff) | |
Docs/admin-guide/mm/damon/usage: document weight sysfs file
Update DAMON usage document for newly added probe weight file.
Link: https://lore.kernel.org/20260710134651.18084-19-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | Documentation/admin-guide/mm/damon/usage.rst | 11 | ||||
| -rw-r--r-- | 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 b2649ea011f9..da5f9afd08ae 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 6d79e7d69be8..aed6cb1cf483 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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |