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Docs/admin-guide/mm/damon/usage: update for young page type DAMOS filter
Update DAMON usage document for the newly added DAMOS filter type, 'young page'. Link: https://lkml.kernel.org/r/20240426195247.100306-7-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Honggyu Kim <honggyu.kim@sk.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -410,19 +410,19 @@ in the numeric order.
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Each filter directory contains six files, namely ``type``, ``matcing``,
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``memcg_path``, ``addr_start``, ``addr_end``, and ``target_idx``. To ``type``
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file, you can write one of four special keywords: ``anon`` for anonymous pages,
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``memcg`` for specific memory cgroup, ``addr`` for specific address range (an
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open-ended interval), or ``target`` for specific DAMON monitoring target
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filtering. In case of the memory cgroup filtering, you can specify the memory
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cgroup of the interest by writing the path of the memory cgroup from the
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cgroups mount point to ``memcg_path`` file. In case of the address range
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filtering, you can specify the start and end address of the range to
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``addr_start`` and ``addr_end`` files, respectively. For the DAMON monitoring
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target filtering, you can specify the index of the target between the list of
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the DAMON context's monitoring targets list to ``target_idx`` file. You can
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write ``Y`` or ``N`` to ``matching`` file to filter out pages that does or does
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not match to the type, respectively. Then, the scheme's action will not be
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applied to the pages that specified to be filtered out.
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file, you can write one of five special keywords: ``anon`` for anonymous pages,
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``memcg`` for specific memory cgroup, ``young`` for young pages, ``addr`` for
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specific address range (an open-ended interval), or ``target`` for specific
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DAMON monitoring target filtering. In case of the memory cgroup filtering, you
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can specify the memory cgroup of the interest by writing the path of the memory
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cgroup from the cgroups mount point to ``memcg_path`` file. In case of the
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address range filtering, you can specify the start and end address of the range
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to ``addr_start`` and ``addr_end`` files, respectively. For the DAMON
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monitoring target filtering, you can specify the index of the target between
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the list of the DAMON context's monitoring targets list to ``target_idx`` file.
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You can write ``Y`` or ``N`` to ``matching`` file to filter out pages that does
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or does not match to the type, respectively. Then, the scheme's action will
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not be applied to the pages that specified to be filtered out.
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For example, below restricts a DAMOS action to be applied to only non-anonymous
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pages of all memory cgroups except ``/having_care_already``.::
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