[RFC PATCH 14/19] mm/damon/sysfs: setup probes on DAMON core API parameters

SeongJae Park
2026-04-26T20:52:39Z

Add user-installed data probes to DAMON core API parameters, so that
user inputs for data probes are passed to DAMON core.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
mm/damon/sysfs.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 2e0b7eca6bcbf..8007961295d3d 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1855,6 +1855,40 @@ static int damon_sysfs_set_attrs(struct damon_ctx *ctx,
return damon_set_attrs(ctx, &attrs);
}

+static int damon_sysfs_set_probes(struct damon_ctx *ctx,
+ struct damon_sysfs_probes *sys_probes)
+{
+ int i;
+
+ for (i = 0; i < sys_probes->nr; i++) {
+ struct damon_sysfs_filters *sys_filters =
+ sys_probes->probes_arr[i]->filters;
+ struct damon_probe *c;
+ int j;
+
+ if (!sys_filters)
+ continue;
+ c = damon_new_probe();
+ if (!c)
+ return -ENOMEM;
+ damon_add_probe(ctx, c);
+
+ for (j = 0; j < sys_filters->nr; j++) {
+ struct damon_sysfs_filter *sys_filter =
+ sys_filters->filters_arr[j];
+ struct damon_filter *t;
+
+ t = damon_new_filter(sys_filter->type,
+ sys_filter->matching,
+ sys_filter->allow);
+ if (!t)
+ return -ENOMEM;
+ damon_add_filter(c, t);
+ }
+ }
+ return 0;
+}
+
static int damon_sysfs_set_regions(struct damon_target *t,
struct damon_sysfs_regions *sysfs_regions,
unsigned long min_region_sz)
@@ -1967,6 +2001,9 @@ static int damon_sysfs_apply_inputs(struct damon_ctx *ctx,
DAMON_MIN_REGION_SZ / sys_ctx->addr_unit, 1);
ctx->pause = sys_ctx->pause;
err = damon_sysfs_set_attrs(ctx, sys_ctx->attrs);
+ if (err)
+ return err;
+ err = damon_sysfs_set_probes(ctx, sys_ctx->attrs->probes);
if (err)
return err;
err = damon_sysfs_add_targets(ctx, sys_ctx->targets);
--
2.47.3