1 files changed, 33 insertions, 2 deletions
diff --git a/tools/testing/selftests/damon/sysfs.py b/tools/testing/selftests/damon/sysfs.py
index aa03a1187489..3ffa054b6386 100755
--- a/tools/testing/selftests/damon/sysfs.py
+++ b/tools/testing/selftests/damon/sysfs.py
@@ -119,7 +119,7 @@ def assert_access_pattern_committed(pattern, dump):
                 'max_nr_accesses', dump)
     assert_true(dump['min_age_region'] == pattern.age[0], 'min_age_region',
                 dump)
-    assert_true(dump['max_age_region'] == pattern.age[1], 'miaxage_region',
+    assert_true(dump['max_age_region'] == pattern.age[1], 'max_age_region',
                 dump)
 
 def assert_scheme_committed(scheme, dump):
@@ -129,7 +129,7 @@ def assert_scheme_committed(scheme, dump):
             'cold': 1,
             'pageout': 2,
             'hugepage': 3,
-            'nohugeapge': 4,
+            'nohugepage': 4,
             'collapse': 5,
             'lru_prio': 6,
             'lru_deprio': 7,
@@ -250,6 +250,35 @@ def assert_ctxs_committed(kdamonds):
             if ctx in ctxs_paused_for_dump:
                 ctx.pause = False
 
+def test_memcg_filter_memcg_path_staging():
+    global kdamonds
+    memcg_filter = _damon_sysfs.DamosFilter(
+            type_='memcg', matching=True, allow=True, memcg_path='/')
+    kdamonds = _damon_sysfs.Kdamonds(
+            [_damon_sysfs.Kdamond(
+                contexts=[_damon_sysfs.DamonCtx(
+                    targets=[_damon_sysfs.DamonTarget(pid=-1)],
+                    schemes=[_damon_sysfs.Damos(
+                        ops_filters=[memcg_filter])],
+                    )])])
+    kdamonds.start()
+
+    shown, rd_err = _damon_sysfs.read_file(
+            os.path.join(memcg_filter.sysfs_dir(), 'memcg_path'))
+    if rd_err is not None:
+        print('memcg_path staging: sysfs read (%s)' % rd_err)
+        kdamonds.stop()
+        exit(1)
+    if shown.rstrip('\n') != memcg_filter.memcg_path:
+        print('memcg_path staging: memcg_path readback '
+              '(shown=%s, expected=%s)' %
+              (shown.rstrip('\n'), memcg_filter.memcg_path))
+        kdamonds.stop()
+        exit(1)
+
+    kdamonds.stop()
+    kdamonds = None
+
 def main():
     global kdamonds
     kdamonds = _damon_sysfs.Kdamonds(
@@ -356,5 +385,7 @@ def main():
     assert_ctxs_committed(kdamonds)
     kdamonds.stop()
 
+    test_memcg_filter_memcg_path_staging()
+
 if __name__ == '__main__':
     main()