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Docs/admin-guide/mm/damon/usage: update for young page type DAMOS filter

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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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SeongJae Park 2024-04-26 12:52:45 -07:00 committed by Andrew Morton
parent 26dd7cc7bb
commit ed13c93b93
1 changed files with 13 additions and 13 deletions
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Documentation/admin-guide/mm/damon/usage.rst
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@ -410,19 +410,19 @@ in the numeric order.
Each filter directory contains six files, namely ``type``, ``matcing``,
``memcg_path``, ``addr_start``, ``addr_end``, and ``target_idx``. To ``type``
file, you can write one of four special keywords: ``anon`` for anonymous pages,
``memcg`` for specific memory cgroup, ``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. 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.
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.
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.
For example, below restricts a DAMOS action to be applied to only non-anonymous
pages of all memory cgroups except ``/having_care_already``.::