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mm/damon/core: commit damos->migrate_dests

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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: 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:
Bijan Tabatabai
2025-07-08 19:59:37 -05:00
committed by Andrew Morton
parent 3a4785c2d3
commit cbc4eea4ff
1 changed files with 39 additions and 0 deletions
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39
mm/damon/core.c
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@@ -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;
}