mm/damon/core: extend merge function to work with probe hits

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When probe weights are set, users may want DAMON monitoring results to be
optimized for the weights.  For that, regions adjustment should work for
the weighted sum of probe hits.  Extend damon_merge_regions_of() to detect
if the weights are set, and work with probe hits in the case.

The weights setup detection function is incomplete.  It always returns
false.  It is intentional, so that more changes to completely support
weights can be made in an incremental but safe way.  Until the function is
completed, all changes depend on it is no-op, so DAMON works in the
current mode.

Link: https://lore.kernel.org/20260710134651.18084-9-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

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SJ Park 2026-07-10 06:46:37 -07:00 • committed by Andrew Morton

parent e1f150d415

commit 0d1daaed8b

2 changed files with 50 additions and 12 deletions

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49

mm/damon/core.c

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13

mm/damon/tests/core-kunit.h

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