diff --git a/mm/damon.c b/mm/damon.c
index 8bd9b989aeb2..56725faca51f 100644
--- a/mm/damon.c
+++ b/mm/damon.c
@@ -59,17 +59,22 @@ struct damon_task {
 /*
  * For each 'sample_interval', DAMON checks whether each region is accessed or
  * not.  It aggregates and keeps the access information (number of accesses to
- * each region) for each 'aggr_interval' time.
+ * each region) for each 'aggr_interval' time.  And for each
+ * 'regions_update_interval', damon checks whether the memory mapping of the
+ * target tasks has changed (e.g., by mmap() calls from the applications) and
+ * applies the changes.
  *
  * All time intervals are in micro-seconds.
  */
 struct damon_ctx {
 	unsigned long sample_interval;
 	unsigned long aggr_interval;
+	unsigned long regions_update_interval;
 	unsigned long min_nr_regions;
 	unsigned long max_nr_regions;
 
 	struct timespec64 last_aggregation;
+	struct timespec64 last_regions_update;
 
 	struct task_struct *kdamond;
 	bool kdamond_stop;
@@ -671,6 +676,87 @@ static void kdamond_split_regions(struct damon_ctx *ctx)
 		damon_split_regions_of(ctx, t);
 }
 
+/*
+ * Check whether it is time to check and apply the dynamic mmap changes
+ *
+ * Returns true if it is.
+ */
+static bool kdamond_need_update_regions(struct damon_ctx *ctx)
+{
+	return damon_check_reset_time_interval(&ctx->last_regions_update,
+			ctx->regions_update_interval);
+}
+
+static bool damon_intersect(struct damon_region *r, struct region *re)
+{
+	return !(r->vm_end <= re->start || re->end <= r->vm_start);
+}
+
+/*
+ * Update damon regions for the three big regions of the given task
+ *
+ * t		the given task
+ * bregions	the three big regions of the task
+ */
+static void damon_apply_three_regions(struct damon_ctx *ctx,
+		struct damon_task *t, struct region bregions[3])
+{
+	struct damon_region *r, *next;
+	unsigned int i = 0;
+
+	/* Remove regions which isn't in the three big regions now */
+	damon_for_each_region_safe(r, next, t) {
+		for (i = 0; i < 3; i++) {
+			if (damon_intersect(r, &bregions[i]))
+				break;
+		}
+		if (i == 3)
+			damon_destroy_region(r);
+	}
+
+	/* Adjust intersecting regions to fit with the threee big regions */
+	for (i = 0; i < 3; i++) {
+		struct damon_region *first = NULL, *last;
+		struct damon_region *newr;
+		struct region *br;
+
+		br = &bregions[i];
+		/* Get the first and last regions which intersects with br */
+		damon_for_each_region(r, t) {
+			if (damon_intersect(r, br)) {
+				if (!first)
+					first = r;
+				last = r;
+			}
+			if (r->vm_start >= br->end)
+				break;
+		}
+		if (!first) {
+			/* no damon_region intersects with this big region */
+			newr = damon_new_region(ctx, br->start, br->end);
+			damon_add_region(newr, damon_prev_region(r), r);
+		} else {
+			first->vm_start = br->start;
+			last->vm_end = br->end;
+		}
+	}
+}
+
+/*
+ * Update regions for current memory mappings
+ */
+static void kdamond_update_regions(struct damon_ctx *ctx)
+{
+	struct region three_regions[3];
+	struct damon_task *t;
+
+	damon_for_each_task(ctx, t) {
+		if (damon_three_regions_of(t, three_regions))
+			continue;
+		damon_apply_three_regions(ctx, t, three_regions);
+	}
+}
+
 /*
  * Check whether current monitoring should be stopped
  *
@@ -735,6 +821,9 @@ static int kdamond_fn(void *data)
 			kdamond_split_regions(ctx);
 		}
 
+		if (kdamond_need_update_regions(ctx))
+			kdamond_update_regions(ctx);
+
 		usleep_range(ctx->sample_interval, ctx->sample_interval + 1);
 	}
 	damon_for_each_task(ctx, t) {
@@ -820,6 +909,7 @@ static int damon_set_pids(struct damon_ctx *ctx,
  *
  * sample_int		time interval between samplings
  * aggr_int		time interval between aggregations
+ * regions_update_int	time interval between vma update checks
  * min_nr_reg		minimal number of regions
  * max_nr_reg		maximum number of regions
  *
@@ -828,9 +918,9 @@ static int damon_set_pids(struct damon_ctx *ctx,
  *
  * Returns 0 on success, negative error code otherwise.
  */
-static int damon_set_attrs(struct damon_ctx *ctx,
-			unsigned long sample_int, unsigned long aggr_int,
-			unsigned long min_nr_reg, unsigned long max_nr_reg)
+static int damon_set_attrs(struct damon_ctx *ctx, unsigned long sample_int,
+		unsigned long aggr_int, unsigned long regions_update_int,
+		unsigned long min_nr_reg, unsigned long max_nr_reg)
 {
 	if (min_nr_reg < 3) {
 		pr_err("min_nr_regions (%lu) should be bigger than 2\n",
@@ -845,6 +935,7 @@ static int damon_set_attrs(struct damon_ctx *ctx,
 
 	ctx->sample_interval = sample_int;
 	ctx->aggr_interval = aggr_int;
+	ctx->regions_update_interval = regions_update_int;
 	ctx->min_nr_regions = min_nr_reg;
 	ctx->max_nr_regions = max_nr_reg;
 	return 0;
