linux-kernel - [PATCH 5/8] selftests/damon/_damon_sysfs: implement kdamonds stop function

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Date: Tue, 25 Jun 2024 11:05:35 -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,
	linux-mm@...ck.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 5/8] selftests/damon/_damon_sysfs: implement kdamonds stop function

Implement DAMON stop function on the test-purpose DAMON sysfs interface
wrapper Python module, _damon_sysfs.py.  This feature will be used by
future DAMON tests that need to start/stop DAMON multiple times.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 tools/testing/selftests/damon/_damon_sysfs.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py
index f975742f29b3..17352b9d204d 100644
--- a/tools/testing/selftests/damon/_damon_sysfs.py
+++ b/tools/testing/selftests/damon/_damon_sysfs.py
@@ -406,6 +406,10 @@ class Kdamond:
         err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'on')
         return err
 
+    def stop(self):
+        err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'off')
+        return err
+
     def update_schemes_tried_regions(self):
         err = write_file(os.path.join(self.sysfs_dir(), 'state'),
                          'update_schemes_tried_regions')
@@ -511,3 +515,10 @@ class Kdamonds:
             if err is not None:
                 return err
         return None
+
+    def stop(self):
+        for kdamond in self.kdamonds:
+            err = kdamond.stop()
+            if err is not None:
+                return err
+        return None
-- 
2.39.2