[merged mm-stable] mm-damon-core-ask-apply_probe-to-return-max-probe-hits-weighted-sum.patch removed from -mm tree

[merged mm-stable] mm-damon-core-ask-apply_probe-to-return-max-probe-hits-weighted-sum.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/damon/core: ask apply_probe() to return max probe hits weighted sum
has been removed from the -mm tree.  Its filename was
     mm-damon-core-ask-apply_probe-to-return-max-probe-hits-weighted-sum.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: SJ Park <sj@kernel.org>
Subject: mm/damon/core: ask apply_probe() to return max probe hits weighted sum
Date: Fri, 10 Jul 2026 06:46:33 -0700

check_accesses() DAMON ops callback returns the maximum nr_accesses of
regions.  DAMON core uses it to calculate a reasonable region merge
threshold.  The core will need to adjust regions for not nr_accesses but
probe hits weighted sum in future.  For that, the core needs to know the
maximum weighted sum of the regions.  Update the protocol for the task.

Link: https://lore.kernel.org/20260710134651.18084-5-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>
---

 include/linux/damon.h |    5 ++++-
 mm/damon/core.c       |    2 +-
 mm/damon/paddr.c      |    4 +++-
 3 files changed, 8 insertions(+), 3 deletions(-)

--- a/include/linux/damon.h~mm-damon-core-ask-apply_probe-to-return-max-probe-hits-weighted-sum
+++ a/include/linux/damon.h
@@ -649,6 +649,8 @@ enum damon_ops_id {
  * @apply_probes should apply the data attribute probes to each region and
  * accordingly update the probe hits counter of the region.  It should also
  * set &damon_region->sampling_addr of each region if ``set_samples`` is true.
+ * It should also return maximum probe hits weighted sum of regions if
+ * ``return_max_wsum`` is true.
  * @get_scheme_score should return the priority score of a region for a scheme
  * as an integer in [0, &DAMOS_MAX_SCORE].
  * @apply_scheme is called from @kdamond when a region for user provided
@@ -666,7 +668,8 @@ struct damon_operations {
 	void (*update)(struct damon_ctx *context);
 	void (*prepare_access_checks)(struct damon_ctx *context);
 	unsigned int (*check_accesses)(struct damon_ctx *context);
-	void (*apply_probes)(struct damon_ctx *context, bool set_samples);
+	unsigned int (*apply_probes)(struct damon_ctx *context,
+			bool set_samples, bool return_max_wsum);
 	int (*get_scheme_score)(struct damon_ctx *context,
 			struct damon_region *r, struct damos *scheme);
 	unsigned long (*apply_scheme)(struct damon_ctx *context,
--- a/mm/damon/core.c~mm-damon-core-ask-apply_probe-to-return-max-probe-hits-weighted-sum
+++ a/mm/damon/core.c
@@ -3692,7 +3692,7 @@ static int kdamond_fn(void *data)
 		if (ctx->ops.check_accesses)
 			max_nr_accesses = ctx->ops.check_accesses(ctx);
 		if (ctx->ops.apply_probes)
-			ctx->ops.apply_probes(ctx, false);
+			ctx->ops.apply_probes(ctx, false, false);
 
 		if (time_after_eq(ctx->passed_sample_intervals,
 					next_aggregation_sis)) {
--- a/mm/damon/paddr.c~mm-damon-core-ask-apply_probe-to-return-max-probe-hits-weighted-sum
+++ a/mm/damon/paddr.c
@@ -166,7 +166,8 @@ static bool damon_pa_filter_pass(phys_ad
 	return pass;
 }
 
-static void damon_pa_apply_probes(struct damon_ctx *ctx, bool set_samples)
+static unsigned int damon_pa_apply_probes(struct damon_ctx *ctx,
+		bool set_samples, bool return_max_wsum)
 {
 	struct damon_target *t;
 	struct damon_region *r;
@@ -194,6 +195,7 @@ static void damon_pa_apply_probes(struct
 				folio_put(folio);
 		}
 	}
+	return 0;
 }
 
 /*
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-adjust-isolated-pages-stat-for-damos_migrate_hotcold.patch
samples-damon-mtier-error-out-for-zero-quota-goal-target-values.patch
mm-damon-lru_sort-error-out-for-10000-active_mem_bp.patch
mm-damon-reclaim-skip-damon_call-if-ctx-has-not-started.patch
mm-damon-lru_sort-skip-damon_call-if-ctx-has-not-started.patch
mm-damon-core-skip-aging-from-repeated-aggressive-merging.patch
mm-damon-core-hide-private-damon_region-fields.patch
mm-damon-core-hide-private-damon_target-fields.patch
mm-damon-core-hide-private-damos_quota_goal-fields.patch
mm-damon-core-hide-private-damos_quota-fields.patch
mm-damon-core-hide-private-damos_filter-fields.patch
mm-damon-core-hide-private-damos-fields.patch
mm-damon-core-hide-private-damon_filter-fields.patch
mm-damon-core-hide-private-damon_probe-fields.patch
mm-damon-sysfs-do-not-directly-access-damon_ctx-ops.patch
mm-damon-core-hide-core-private-damon_ctx-fields.patch
mm-damon-core-avoid-infinite-kdamond_merge_regions-internal-loop.patch
mm-damon-tests-core-kunit-catch-test-failure-in-test_merge_regions_of.patch
mm-damon-vaddr-drop-last-same-folio-access-check-optimization.patch
mm-damon-paddr-drop-last-same-folio-access-check-reuse-optimization.patch
mm-damon-sysfs-read-addr_unit-only-once-in-damon_sysfs_apply_inputs.patch
mm-damon-sysfs-read-ops_id-only-once-in-damon_sysfs_apply_inputs.patch
mm-damon-core-initialize-damos-last_applied.patch
mm-damon-core-kunit-check-region-count-before-testing-in-split_at.patch
mm-damon-vaddr-kunit-check-region-count-in-three_regions-test.patch
mm-damon-core-kunit-handle-region-split-failure-in-filter_out.patch
mm-damon-core-kunit-skip-wrong-dest-walk-in-commit_dests_for.patch
mm-damon-core-kunit-skip-wrong-quota-goal-walk-in-commit_quota_goals.patch
mm-damon-core-kunit-skip-wrong-region-walk-in-commit_target_regions.patch
mm-damon-ops-common-use-nr_accesses-moving-sum-for-quota-score.patch
mm-damon-core-handle-region-split-failure-in-apply_min_nr_regions.patch