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Docs/admin-guide/mm/damon/usage: document hugepage_size filter type

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This includes both the 'hugepage_size' filter type and the min/max files
used to decide range of sizes to filter on.

Link: https://lkml.kernel.org/r/20250211124437.278873-5-usamaarif642@gmail.com
Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Usama Arif 2025-02-11 12:43:43 +00:00 committed by Andrew Morton
parent 807db03c59
commit 4ddb209268
1 changed files with 9 additions and 8 deletions
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17
Documentation/admin-guide/mm/damon/usage.rst
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@ -83,7 +83,7 @@ comma (",").
│ │ │ │ │ │ │ │ │ 0/target_metric,target_value,current_value
│ │ │ │ │ │ │ :ref:`watermarks <sysfs_watermarks>`/metric,interval_us,high,mid,low
│ │ │ │ │ │ │ :ref:`filters <sysfs_filters>`/nr_filters
│ │ │ │ │ │ │ │ 0/type,matching,allow,memcg_path,addr_start,addr_end,target_idx
│ │ │ │ │ │ │ │ 0/type,matching,allow,memcg_path,addr_start,addr_end,target_idx,min,max
│ │ │ │ │ │ │ :ref:`stats <sysfs_schemes_stats>`/nr_tried,sz_tried,nr_applied,sz_applied,sz_ops_filter_passed,qt_exceeds
│ │ │ │ │ │ │ :ref:`tried_regions <sysfs_schemes_tried_regions>`/total_bytes
│ │ │ │ │ │ │ │ 0/start,end,nr_accesses,age,sz_filter_passed
@ -406,13 +406,14 @@ number (``N``) to the file creates the number of child directories named ``0``
to ``N-1``. Each directory represents each filter. The filters are evaluated
in the numeric order.
Each filter directory contains seven files, namely ``type``, ``matching``,
``allow``, ``memcg_path``, ``addr_start``, ``addr_end``, and ``target_idx``.
To ``type`` 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. Meaning of the
types are same to the description on the :ref:`design doc
Each filter directory contains nine files, namely ``type``, ``matching``,
``allow``, ``memcg_path``, ``addr_start``, ``addr_end``, ``min``, ``max``
and ``target_idx``. To ``type`` file, you can write one of six special
keywords: ``anon`` for anonymous pages, ``memcg`` for specific memory cgroup,
``young`` for young pages, ``addr`` for specific address range (an open-ended
interval), ``hugepage_size`` for large folios of a specific size range [``min``,
``max``] or ``target`` for specific 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