Commit cbc4eea4 authored by Bijan Tabatabai's avatar Bijan Tabatabai Committed by Andrew Morton
Browse files

mm/damon/core: commit damos->migrate_dests 

When committing new scheme parameters from the sysfs, copy the
migrate_dests struct of the source schemes into the destination schemes.

Link: https://lkml.kernel.org/r/20250709005952.17776-8-bijan311@gmail.com


Signed-off-by: default avatarBijan Tabatabai <bijantabatab@micron.com>
Reviewed-by: default avatarSeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ravi Shankar Jonnalagadda <ravis.opensrc@micron.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 3a4785c2

mm/damon/core.c

+39 −0
Original line number Diff line number Diff line
@@ -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;
@@ -984,6 +1019,10 @@ 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;

}