Commit 9106d467 authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

mm/damon/sysfs-schemes: set damos->migrate_dests 

Pass user-specified multiple DAMOS action destinations and their weights
to DAMON core API, so that user requests can really work.

Link: https://lkml.kernel.org/r/20250709005952.17776-5-bijan311@gmail.com


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
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 2cd0bf85

mm/damon/sysfs-schemes.c

+28 −0
Original line number Diff line number Diff line
@@ -2576,6 +2576,29 @@ void damos_sysfs_update_effective_quotas( 
	}

}



static int damos_sysfs_add_migrate_dest(struct damos *scheme,

		struct damos_sysfs_dests *sysfs_dests)

{

	struct damos_migrate_dests *dests = &scheme->migrate_dests;

	int i;



	dests->node_id_arr = kmalloc_array(sysfs_dests->nr,

			sizeof(*dests->node_id_arr), GFP_KERNEL);

	if (!dests->node_id_arr)

		return -ENOMEM;

	dests->weight_arr = kmalloc_array(sysfs_dests->nr,

			sizeof(*dests->weight_arr), GFP_KERNEL);

	if (!dests->weight_arr)

		/* ->node_id_arr will be freed by scheme destruction */

		return -ENOMEM;

	for (i = 0; i < sysfs_dests->nr; i++) {

		dests->node_id_arr[i] = sysfs_dests->dests_arr[i]->id;

		dests->weight_arr[i] = sysfs_dests->dests_arr[i]->weight;

	}

	dests->nr_dests = sysfs_dests->nr;

	return 0;

}



static struct damos *damon_sysfs_mk_scheme(

		struct damon_sysfs_scheme *sysfs_scheme)

{
@@ -2638,6 +2661,11 @@ static struct damos *damon_sysfs_mk_scheme( 
		damon_destroy_scheme(scheme);

		return NULL;

	}

	err = damos_sysfs_add_migrate_dest(scheme, sysfs_scheme->dests);

	if (err) {

		damon_destroy_scheme(scheme);

		return NULL;

	}

	return scheme;

}