Docs/admin-guide/mm/damon/usage: omit DAMOS filter details in favor of design doc

DAMON usage document is describing some details about DAMOS filters, which
are also documented on the design doc.  Deduplicate the details in favor
of the design doc.

Link: https://lkml.kernel.org/r/20250109175126.57878-10-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst
index 71cf29ae85025e04cc0407da7cc1c3b4ce76efcf..8df3357dcfa3278274e07874f00189e24fa7e70d 100644 (file)
--- a/Documentation/admin-guide/mm/damon/usage.rst
+++ b/Documentation/admin-guide/mm/damon/usage.rst
@@ -411,13 +411,17 @@ Each filter directory contains six files, namely ``type``, ``matcing``,
 file, you can write one of five special keywords: ``anon`` for anonymous pages,
 ``memcg`` for specific memory cgroup, ``young`` for young pages, ``addr`` for
 specific address range (an open-ended interval), or ``target`` for specific
-DAMON monitoring target filtering.  In case of the memory cgroup filtering, you
-can specify the memory cgroup of the interest by writing the path of the memory
-cgroup from the cgroups mount point to ``memcg_path`` file.  In case of the
-address range filtering, you can specify the start and end address of the range
-to ``addr_start`` and ``addr_end`` files, respectively.  For the DAMON
-monitoring target filtering, you can specify the index of the target between
-the list of the DAMON context's monitoring targets list to ``target_idx`` file.
+DAMON monitoring target filtering.  Meaning of the types are same to the
+description on the :ref:`design doc <damon_design_damos_filters>`.
+
+In case of the memory cgroup filtering, you can specify the memory cgroup of
+the interest by writing the path of the memory cgroup from the cgroups mount
+point to ``memcg_path`` file.  In case of the address range filtering, you can
+specify the start and end address of the range to ``addr_start`` and
+``addr_end`` files, respectively.  For the DAMON monitoring target filtering,
+you can specify the index of the target between the list of the DAMON context's
+monitoring targets list to ``target_idx`` file.
+
 You can write ``Y`` or ``N`` to ``matching`` file to filter out pages that does
 or does not match to the type, respectively.  Then, the scheme's action will
 not be applied to the pages that specified to be filtered out.
@@ -434,14 +438,9 @@ pages of all memory cgroups except ``/having_care_already``.::
     echo /having_care_already > 1/memcg_path
     echo Y > 1/matching
 
-Note that ``anon`` and ``memcg`` filters are currently supported only when
-``paddr`` :ref:`implementation <sysfs_context>` is being used.
-
-Also, memory regions that are filtered out by ``addr`` or ``target`` filters
-are not counted as the scheme has tried to those, while regions that filtered
-out by other type filters are counted as the scheme has tried to.  The
-difference is applied to :ref:`stats <damos_stats>` and
-:ref:`tried regions <sysfs_schemes_tried_regions>`.
+Refer to the :ref:`DAMOS filters design documentation
+<damon_design_damos_filters>` for more details including when each of the
+filters are supported and differences on stats.
 
 .. _sysfs_schemes_stats: