From: Bijan Tabatabai <bijantabatab@xxxxxxxxxx>
When committing new scheme parameters from the sysfs, copy the
target_nid and migrate_dests of the source schemes into the destination
schemes.
Signed-off-by: Bijan Tabatabai <bijantabatab@xxxxxxxxxx>
---
mm/damon/core.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/mm/damon/core.c b/mm/damon/core.c
index a4c3cfe531df..0565aae8d1fa 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -943,6 +943,41 @@ static void damos_set_filters_default_reject(struct damos *s)
damos_filters_default_reject(&s->ops_filters);
}
+static int damos_commit_dests(struct damos *dst, struct damos *src)
+{
+ struct damos_migrate_dests *dst_dests, *src_dests;
+
+ dst_dests = &dst->migrate_dests;
+ src_dests = &src->migrate_dests;
+
+ if (dst_dests->nr_dests != src_dests->nr_dests) {
+ kfree(dst_dests->node_id_arr);
+ kfree(dst_dests->weight_arr);
+
+ dst_dests->node_id_arr = kmalloc_array(src_dests->nr_dests,
+ sizeof(*dst_dests->node_id_arr), GFP_KERNEL);
+ if (!dst_dests->node_id_arr) {
+ dst_dests->weight_arr = NULL;
+ return -ENOMEM;
+ }
+
+ dst_dests->weight_arr = kmalloc_array(src_dests->nr_dests,
+ sizeof(*dst_dests->weight_arr), GFP_KERNEL);
+ if (!dst_dests->weight_arr) {
+ /* ->node_id_arr will be freed by scheme destruction */
+ return -ENOMEM;
+ }
+ }
+
+ dst_dests->nr_dests = src_dests->nr_dests;
+ for (int i = 0; i < src_dests->nr_dests; i++) {
+ dst_dests->node_id_arr[i] = src_dests->node_id_arr[i];
+ dst_dests->weight_arr[i] = src_dests->weight_arr[i];
+ }
+
+ return 0;
+}
+
static int damos_commit_filters(struct damos *dst, struct damos *src)
{
int err;
@@ -983,6 +1018,11 @@ static int damos_commit(struct damos *dst, struct damos *src)
dst->wmarks = src->wmarks;
+ dst->target_nid = src->target_nid;
+ err = damos_commit_dests(dst, src);
+ if (err)
+ return err;
+
err = damos_commit_filters(dst, src);
return err;
}
--
2.43.5
