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

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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: SeongJae Park <sj@kernel.org>
Signed-off-by: Bijan Tabatabai <bijantabatab@micron.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ravi Shankar Jonnalagadda <ravis.opensrc@micron.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2025-07-08 19:59:34 -05:00
committed by Andrew Morton
parent 2cd0bf85a2
commit 9106d46753
1 changed files with 28 additions and 0 deletions
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28
mm/damon/sysfs-schemes.c
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@@ -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;
}