1 files changed, 15 insertions, 6 deletions

diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst
index 4bfdf1d30c4a..134912166f5a 100644
--- a/Documentation/mm/damon/design.rst
+++ b/Documentation/mm/damon/design.rst
@@ -380,12 +380,21 @@ number of filters for each scheme.  Each filter specifies the type of target
 memory, and whether it should exclude the memory of the type (filter-out), or
 all except the memory of the type (filter-in).
 
-As of this writing, anonymous page type and memory cgroup type are supported by
-the feature.  Some filter target types can require additional arguments.  For
-example, the memory cgroup filter type asks users to specify the file path of
-the memory cgroup for the filter.  Hence, users can apply specific schemes to
-only anonymous pages, non-anonymous pages, pages of specific cgroups, all pages
-excluding those of specific cgroups, and any combination of those.
+Currently, anonymous page, memory cgroup, and address range type filters are
+supported by the feature.  Some filter target types can require additional
+arguments.  For example, the memory cgroup filter type asks users to specify
+the file path of the memory cgroup for the filter, while the address range type
+asks the start and end addresses of the range.  Hence, users can apply specific
+schemes to only anonymous pages, non-anonymous pages, pages of specific
+cgroups, all pages excluding those of specific cgroups, pages in specific
+address range, and any combination of those.
+
+To handle filters efficiently, the address range type filter is handled by the
+core layer, while others are handled by operations set.  If a memory region is
+filtered by the core layer-handled filter, it is not counted as the scheme has
+tried to the region.  In contrast, if a memory regions is filtered by an
+operations set layer-handled filter, it is counted as the scheme has tried.
+The difference in accounting leads to changes in the statistics.
 
 
 Application Programming Interface