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Docs/admin-guide/mm/damon/lru_sort: document filter_young_pages

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Document the new DAMON_LRU_SORT parameter, filter_young_pages.  It can be
used to use page level access re-check for the LRU sorting.

Link: https://lkml.kernel.org/r/20260113152717.70459-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: wang lian <lianux.mm@gmail.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2026-01-13 07:27:12 -08:00
committed by Andrew Morton
parent 303dbb1f08
commit b36aefb866
1 changed files with 14 additions and 0 deletions
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14
Documentation/admin-guide/mm/damon/lru_sort.rst
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@@ -79,6 +79,20 @@ of parametrs except ``enabled`` again. Once the re-reading is done, this
parameter is set as ``N``. If invalid parameters are found while the
re-reading, DAMON_LRU_SORT will be disabled.
filter_young_pages
------------------
Filter [non-]young pages accordingly for LRU [de]prioritizations.
If this is set, check page level access (youngness) once again before each
LRU [de]prioritization operation. LRU prioritization operation is skipped
if the page has not accessed since the last check (not young). LRU
deprioritization operation is skipped if the page has accessed since the
last check (young). The feature is enabled or disabled if this parameter is
set as ``Y`` or ``N``, respectively.
Disabled by default.
hot_thres_access_freq
---------------------