+ mm-damon-rename-damon_min_region-to-damon_min_region_sz.patch added to mm-new branch

+ mm-damon-rename-damon_min_region-to-damon_min_region_sz.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: mm/damon: rename DAMON_MIN_REGION to DAMON_MIN_REGION_SZ
has been added to the -mm mm-new branch.  Its filename is
     mm-damon-rename-damon_min_region-to-damon_min_region_sz.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-rename-damon_min_region-to-damon_min_region_sz.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days

------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon: rename DAMON_MIN_REGION to DAMON_MIN_REGION_SZ
Date: Sat, 17 Jan 2026 09:52:54 -0800

The macro is for the default minimum size of each DAMON region.  There was
a case that a reader was confused if it is the minimum number of total
DAMON regions, which is set on damon_attrs->min_nr_regions.  Make the name
more explicit.

Link: https://lkml.kernel.org/r/20260117175256.82826-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/damon.h        |    2 +-
 mm/damon/core.c              |    2 +-
 mm/damon/lru_sort.c          |    2 +-
 mm/damon/reclaim.c           |    2 +-
 mm/damon/sysfs.c             |    2 +-
 mm/damon/tests/vaddr-kunit.h |    2 +-
 mm/damon/vaddr.c             |   24 ++++++++++++------------
 7 files changed, 18 insertions(+), 18 deletions(-)

--- a/include/linux/damon.h~mm-damon-rename-damon_min_region-to-damon_min_region_sz
+++ a/include/linux/damon.h
@@ -15,7 +15,7 @@
 #include <linux/random.h>
 
 /* Minimal region size.  Every damon_region is aligned by this. */
-#define DAMON_MIN_REGION	PAGE_SIZE
+#define DAMON_MIN_REGION_SZ	PAGE_SIZE
 /* Max priority score for DAMON-based operation schemes */
 #define DAMOS_MAX_SCORE		(99)
 
--- a/mm/damon/core.c~mm-damon-rename-damon_min_region-to-damon_min_region_sz
+++ a/mm/damon/core.c
@@ -553,7 +553,7 @@ struct damon_ctx *damon_new_ctx(void)
 	ctx->attrs.max_nr_regions = 1000;
 
 	ctx->addr_unit = 1;
-	ctx->min_sz_region = DAMON_MIN_REGION;
+	ctx->min_sz_region = DAMON_MIN_REGION_SZ;
 
 	INIT_LIST_HEAD(&ctx->adaptive_targets);
 	INIT_LIST_HEAD(&ctx->schemes);
--- a/mm/damon/lru_sort.c~mm-damon-rename-damon_min_region-to-damon_min_region_sz
+++ a/mm/damon/lru_sort.c
@@ -298,7 +298,7 @@ static int damon_lru_sort_apply_paramete
 	if (!monitor_region_start && !monitor_region_end)
 		addr_unit = 1;
 	param_ctx->addr_unit = addr_unit;
-	param_ctx->min_sz_region = max(DAMON_MIN_REGION / addr_unit, 1);
+	param_ctx->min_sz_region = max(DAMON_MIN_REGION_SZ / addr_unit, 1);
 
 	if (!damon_lru_sort_mon_attrs.sample_interval) {
 		err = -EINVAL;
--- a/mm/damon/reclaim.c~mm-damon-rename-damon_min_region-to-damon_min_region_sz
+++ a/mm/damon/reclaim.c
@@ -208,7 +208,7 @@ static int damon_reclaim_apply_parameter
 	if (!monitor_region_start && !monitor_region_end)
 		addr_unit = 1;
 	param_ctx->addr_unit = addr_unit;
-	param_ctx->min_sz_region = max(DAMON_MIN_REGION / addr_unit, 1);
+	param_ctx->min_sz_region = max(DAMON_MIN_REGION_SZ / addr_unit, 1);
 
 	if (!damon_reclaim_mon_attrs.aggr_interval) {
 		err = -EINVAL;
--- a/mm/damon/sysfs.c~mm-damon-rename-damon_min_region-to-damon_min_region_sz
+++ a/mm/damon/sysfs.c
@@ -1470,7 +1470,7 @@ static int damon_sysfs_apply_inputs(stru
 	/* addr_unit is respected by only DAMON_OPS_PADDR */
 	if (sys_ctx->ops_id == DAMON_OPS_PADDR)
 		ctx->min_sz_region = max(
-				DAMON_MIN_REGION / sys_ctx->addr_unit, 1);
+				DAMON_MIN_REGION_SZ / sys_ctx->addr_unit, 1);
 	err = damon_sysfs_set_attrs(ctx, sys_ctx->attrs);
 	if (err)
 		return err;
--- a/mm/damon/tests/vaddr-kunit.h~mm-damon-rename-damon_min_region-to-damon_min_region_sz
+++ a/mm/damon/tests/vaddr-kunit.h
@@ -147,7 +147,7 @@ static void damon_do_test_apply_three_re
 		damon_add_region(r, t);
 	}
 
-	damon_set_regions(t, three_regions, 3, DAMON_MIN_REGION);
+	damon_set_regions(t, three_regions, 3, DAMON_MIN_REGION_SZ);
 
 	for (i = 0; i < nr_expected / 2; i++) {
 		r = __nth_region_of(t, i);
--- a/mm/damon/vaddr.c~mm-damon-rename-damon_min_region-to-damon_min_region_sz
+++ a/mm/damon/vaddr.c
@@ -19,8 +19,8 @@
 #include "ops-common.h"
 
 #ifdef CONFIG_DAMON_VADDR_KUNIT_TEST
-#undef DAMON_MIN_REGION
-#define DAMON_MIN_REGION 1
+#undef DAMON_MIN_REGION_SZ
+#define DAMON_MIN_REGION_SZ 1
 #endif
 
 /*
@@ -78,7 +78,7 @@ static int damon_va_evenly_split_region(
 
 	orig_end = r->ar.end;
 	sz_orig = damon_sz_region(r);
-	sz_piece = ALIGN_DOWN(sz_orig / nr_pieces, DAMON_MIN_REGION);
+	sz_piece = ALIGN_DOWN(sz_orig / nr_pieces, DAMON_MIN_REGION_SZ);
 
 	if (!sz_piece)
 		return -EINVAL;
@@ -161,12 +161,12 @@ next:
 		swap(first_gap, second_gap);
 
 	/* Store the result */
-	regions[0].start = ALIGN(start, DAMON_MIN_REGION);
-	regions[0].end = ALIGN(first_gap.start, DAMON_MIN_REGION);
-	regions[1].start = ALIGN(first_gap.end, DAMON_MIN_REGION);
-	regions[1].end = ALIGN(second_gap.start, DAMON_MIN_REGION);
-	regions[2].start = ALIGN(second_gap.end, DAMON_MIN_REGION);
-	regions[2].end = ALIGN(prev->vm_end, DAMON_MIN_REGION);
+	regions[0].start = ALIGN(start, DAMON_MIN_REGION_SZ);
+	regions[0].end = ALIGN(first_gap.start, DAMON_MIN_REGION_SZ);
+	regions[1].start = ALIGN(first_gap.end, DAMON_MIN_REGION_SZ);
+	regions[1].end = ALIGN(second_gap.start, DAMON_MIN_REGION_SZ);
+	regions[2].start = ALIGN(second_gap.end, DAMON_MIN_REGION_SZ);
+	regions[2].end = ALIGN(prev->vm_end, DAMON_MIN_REGION_SZ);
 
 	return 0;
 }
@@ -259,8 +259,8 @@ static void __damon_va_init_regions(stru
 		sz += regions[i].end - regions[i].start;
 	if (ctx->attrs.min_nr_regions)
 		sz /= ctx->attrs.min_nr_regions;
-	if (sz < DAMON_MIN_REGION)
-		sz = DAMON_MIN_REGION;
+	if (sz < DAMON_MIN_REGION_SZ)
+		sz = DAMON_MIN_REGION_SZ;
 
 	/* Set the initial three regions of the target */
 	for (i = 0; i < 3; i++) {
@@ -299,7 +299,7 @@ static void damon_va_update(struct damon
 	damon_for_each_target(t, ctx) {
 		if (damon_va_three_regions(t, three_regions))
 			continue;
-		damon_set_regions(t, three_regions, 3, DAMON_MIN_REGION);
+		damon_set_regions(t, three_regions, 3, DAMON_MIN_REGION_SZ);
 	}
 }
 
_

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

mm-damon-core-introduce-nr_snapshots-damos-stat.patch
mm-damon-core-introduce-nr_snapshots-damos-stat-fix.patch
mm-damon-sysfs-schemes-introduce-nr_snapshots-damos-stat-file.patch
docs-mm-damon-design-update-for-nr_snapshots-damos-stat.patch
docs-admin-guide-mm-damon-usage-update-for-nr_snapshots-damos-stat.patch
docs-abi-damon-update-for-nr_snapshots-damos-stat.patch
mm-damon-update-damos-kerneldoc-for-stat-field.patch
mm-damon-core-implement-max_nr_snapshots.patch
mm-damon-sysfs-schemes-implement-max_nr_snapshots-file.patch
docs-mm-damon-design-update-for-max_nr_snapshots.patch
docs-admin-guide-mm-damon-usage-update-for-max_nr_snapshots.patch
docs-abi-damon-update-for-max_nr_snapshots.patch
mm-damon-core-add-trace-point-for-damos-stat-per-apply-interval.patch
mm-damon-tests-core-kunit-add-test-cases-for-multiple-regions-in-damon_test_split_regions_of-fix.patch
mm-damon-core-introduce-active-memory-ratio-damos-quota-goal-metric.patch
mm-damon-sysfs-schemes-support-damos_quota_active_mem_bp.patch
docs-mm-damon-design-document-damos_quota_active_mem_bp.patch
mm-damon-paddr-activate-damos_lru_prio-targets-instead-of-marking-accessed.patch
mm-damon-lru_sort-consider-age-for-quota-prioritization.patch
mm-damon-lru_sort-support-young-page-filters.patch
docs-admin-guide-mm-damon-lru_sort-document-filter_young_pages.patch
mm-damon-lru_sort-support-active-inactive-memory-ratio-based-auto-tuning.patch
mm-damon-lru_sort-support-active-inactive-memory-ratio-based-auto-tuning-fix.patch
docs-admin-guide-mm-damon-lru_sort-document-active_mem_bp-parameter.patch
mm-damon-lru_sort-add-monitoring-intervals-auto-tuning-parameter.patch
docs-admin-guide-mm-damon-lru_sort-document-intervals-autotuning.patch
mm-damon-core-implement-damon_kdamond_pid.patch
mm-damon-sysfs-use-damon_kdamond_pid.patch
mm-damon-lru_sort-use-damon_kdamond_pid.patch
mm-damon-reclaim-use-damon_kdamond_pid.patch
mm-damon-hide-kdamond-and-kdamond_lock-of-damon_ctx.patch
mm-vma-temporary-build-fix.patch
selftests-damon-sysfs_memcg_path_leaksh-use-kmemleak.patch
selftests-damon-wss_estimation-test-for-up-to-160-mib-working-set-size.patch
selftests-damon-access_memory-add-repeat-mode.patch
selftests-damon-wss_estimation-ensure-number-of-collected-wss.patch
selftests-damon-wss_estimation-deduplicate-failed-samples-output.patch
mm-damon-remove-damon_operations-cleanup.patch
mm-damon-core-cleanup-targets-and-regions-at-once-on-kdamond-termination.patch
mm-damon-core-cancel-damos_walk-before-damon_ctx-kdamond-reset.patch
mm-damon-core-process-damon_call_control-requests-on-a-local-list.patch
mm-damon-document-damon_call_control-dealloc_on_cancel-repeat-behavior.patch
mm-damon-core-rename-damos_filter_out-to-damos_core_filter_out.patch
mm-damon-rename-damon_min_region-to-damon_min_region_sz.patch
mm-damon-rename-min_sz_region-of-damon_ctx-to-min_region_sz.patch