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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>
This commit is contained in:
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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26
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``, Each filter directory contains six files, namely ``type``, ``matcing``,
``memcg_path``, ``addr_start``, ``addr_end``, and ``target_idx``. To ``type`` ``memcg_path``, ``addr_start``, ``addr_end``, and ``target_idx``. To ``type``
file, you can write one of four special keywords: ``anon`` for anonymous pages, file, you can write one of five special keywords: ``anon`` for anonymous pages,
``memcg`` for specific memory cgroup, ``addr`` for specific address range (an ``memcg`` for specific memory cgroup, ``young`` for young pages, ``addr`` for
open-ended interval), or ``target`` for specific DAMON monitoring target specific address range (an open-ended interval), or ``target`` for specific
filtering. In case of the memory cgroup filtering, you can specify the memory DAMON monitoring target filtering. In case of the memory cgroup filtering, you
cgroup of the interest by writing the path of the memory cgroup from the can specify the memory cgroup of the interest by writing the path of the memory
cgroups mount point to ``memcg_path`` file. In case of the address range cgroup from the cgroups mount point to ``memcg_path`` file. In case of the
filtering, you can specify the start and end address of the range to address range filtering, you can specify the start and end address of the range
``addr_start`` and ``addr_end`` files, respectively. For the DAMON monitoring to ``addr_start`` and ``addr_end`` files, respectively. For the DAMON
target filtering, you can specify the index of the target between the list of monitoring target filtering, you can specify the index of the target between
the DAMON context's monitoring targets list to ``target_idx`` file. You can the list of the DAMON context's monitoring targets list to ``target_idx`` file.
write ``Y`` or ``N`` to ``matching`` file to filter out pages that does or does You can write ``Y`` or ``N`` to ``matching`` file to filter out pages that does
not match to the type, respectively. Then, the scheme's action will not be or does not match to the type, respectively. Then, the scheme's action will
applied to the pages that specified to be filtered out. 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 For example, below restricts a DAMOS action to be applied to only non-anonymous
pages of all memory cgroups except ``/having_care_already``.:: pages of all memory cgroups except ``/having_care_already``.::