mm/damon/lru_sort: consider age for quota prioritization

DAMON_LRU_SORT is doing under-quota access pattern based regions
prioritization using only access frequency.  Age of regions is another
useful information for distinguishing hot and cold regions.  Use it for
prioritization, too.

Link: https://lkml.kernel.org/r/20260113152717.70459-6-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
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>

diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 9388b091deb71c2d54123d04971881c6c466ba1f..a74c4ec170a953277c8a623b93a2af8a08e53e0c 100644 (file)
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -71,7 +71,7 @@ static struct damos_quota damon_lru_sort_quota = {
        /* Within the quota, mark hotter regions accessed first. */
        .weight_sz = 0,
        .weight_nr_accesses = 1,
-       .weight_age = 0,
+       .weight_age = 1,
 };
 DEFINE_DAMON_MODULES_DAMOS_TIME_QUOTA(damon_lru_sort_quota);