[PATCH 0/2] mm/damon: introduce DAMOS filter type for active pages

Nhat Pham
2025-03-18T18:30:30Z

The memory reclaim algorithm categorizes pages into active and inactive
lists, separately for file and anon pages. The system's performance
relies heavily on the (relative and absolute) accuracy of this
categorization.

This patch series add a new DAMOS filter for pages' activeness, giving
us visibility into the access frequency of the pages on each list. This
insight can help us diagnose issues with the active-inactive balancing
dynamics, and make decisions to optimize reclaim efficiency and memory
utilization.

For instance, we might decide to enable DAMON_LRU_SORT, if we find that
there are pages on the active list that are infrequently accessed, or
less frequently accessed than pages on the inactive list.

Nhat Pham (2):
mm/damon: implement a new DAMOS filter type for active pages
Docs/mm/damon/design: document active DAMOS filter type

Documentation/mm/damon/design.rst | 2 ++
include/linux/damon.h | 2 ++
mm/damon/paddr.c | 3 +++
mm/damon/sysfs-schemes.c | 1 +
4 files changed, 8 insertions(+)

base-commit: 40caf747267c18b6206e26a37d6ea6b695236c11
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2.47.1