diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon
index 19cde386fd15..8c0acb31638b 100644
--- a/Documentation/ABI/testing/sysfs-kernel-mm-damon
+++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon
@@ -430,3 +430,10 @@ Contact:	SeongJae Park <sj@kernel.org>
 Description:	Reading this file returns the 'age' of a memory region that
 		corresponding DAMON-based Operation Scheme's action has tried
 		to be applied.
+
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/sz_filter_passed
+Date:		Dec 2024
+Contact:	SeongJae Park <sj@kernel.org>
+Description:	Reading this file returns the size of the memory in the region
+		that passed DAMON operations layer-handled filters of the
+		scheme in bytes.