linux-kernel - [PATCH 12/22] selftests/damon/sysfs.py: generalize DAMOS Watermarks commit assertion

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Message-Id: <20250720171652.92309-13-sj@kernel.org>
Date: Sun, 20 Jul 2025 10:16:42 -0700
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH 12/22] selftests/damon/sysfs.py: generalize DAMOS Watermarks commit assertion

DamosWatermarks commitment assertion is hard-coded for a specific test
case.  Split it out into a general version that can be reused for
different test cases.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 tools/testing/selftests/damon/sysfs.py | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/damon/sysfs.py b/tools/testing/selftests/damon/sysfs.py
index e67008fd055d..91a28d97b015 100755
--- a/tools/testing/selftests/damon/sysfs.py
+++ b/tools/testing/selftests/damon/sysfs.py
@@ -25,6 +25,22 @@ def fail(expectation, status):
     print(json.dumps(status, indent=4))
     exit(1)
 
+def assert_true(condition, expectation, status):
+    if condition is not True:
+        fail(expectation, status)
+
+def assert_watermarks_committed(watermarks, dump):
+    wmark_metric_val = {
+            'none': 0,
+            'free_mem_rate': 1,
+            }
+    assert_true(dump['metric'] == wmark_metric_val[watermarks.metric],
+                'metric', dump)
+    assert_true(dump['interval'] == watermarks.interval, 'interval', dump)
+    assert_true(dump['high'] == watermarks.high, 'high', dump)
+    assert_true(dump['mid'] == watermarks.mid, 'mid', dump)
+    assert_true(dump['low'] == watermarks.low, 'low', dump)
+
 def main():
     kdamonds = _damon_sysfs.Kdamonds(
             [_damon_sysfs.Kdamond(
@@ -100,14 +116,8 @@ def main():
             }:
         fail('damos quota', status)
 
-    if scheme['wmarks'] != {
-            'metric': 0,
-            'interval': 0,
-            'high': 0,
-            'mid': 0,
-            'low': 0,
-            }:
-        fail('damos wmarks', status)
+    assert_watermarks_committed(_damon_sysfs.DamosWatermarks(),
+                                scheme['wmarks'])
 
     kdamonds.stop()
 
-- 
2.39.5