[RFC PATCH v1.2 01/19] mm/damon/core: introduce damon_probe->weight

[SJ Park <sj@kernel.org>]

Add a new field, weight to damon_probe struct.  The field is used to
specify the degree of the API caller's interest to the data attribute
of the probe.

Signed-off-by: SJ Park <sj@kernel.org>
---
 include/linux/damon.h | 2 ++
 mm/damon/core.c       | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index 63f596957c1f1..d8251c83e6e55 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -760,10 +760,12 @@ struct damon_filter {
 /**
  * struct damon_probe - Data region attribute probe.
  *
+ * @weight:	Relative priority of the attribute for this probe.
  * @filters:	Filters for assessing if a given region is for this probe.
  * @list:	Siblings list.
  */
 struct damon_probe {
+	unsigned int weight;
 	struct list_head filters;
 	struct list_head list;
 };
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 11473aa1f70f4..327398fa4ee56 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -166,6 +166,7 @@ struct damon_probe *damon_new_probe(void)
 	p = kmalloc_obj(*p);
 	if (!p)
 		return NULL;
+	p->weight = 0;
 	INIT_LIST_HEAD(&p->filters);
 	INIT_LIST_HEAD(&p->list);
 	return p;
@@ -1658,6 +1659,7 @@ static int damon_commit_probes(struct damon_ctx *dst, struct damon_ctx *src)
 	damon_for_each_probe_safe(dst_probe, next, dst) {
 		src_probe = damon_nth_probe(i++, src);
 		if (src_probe) {
+			dst_probe->weight = src_probe->weight;
 			err = damon_commit_filters(dst_probe, src_probe);
 			if (err)
 				return err;
@@ -1674,6 +1676,7 @@ static int damon_commit_probes(struct damon_ctx *dst, struct damon_ctx *src)
 		if (!new_probe)
 			return -ENOMEM;
 		damon_add_probe(dst, new_probe);
+		new_probe->weight = src_probe->weight;
 		err = damon_commit_filters(new_probe, src_probe);
 		if (err)
 			return err;
-- 
2.47.3