From 5ac9adecf0cf07b99d4eeda24a89d27447acd860 Mon Sep 17 00:00:00 2001
From: SeongJae Park <sj@kernel.org>
Date: Tue, 25 Jun 2024 11:05:37 -0700
Subject: [PATCH] _damon_sysfs: implement commit() for online parameters update
Users can update DAMON parameters while it is running, using 'commit'
DAMON sysfs interface command. For testing the feature in future tests,
implement a function for doing that on the test-purpose DAMON sysfs
interface wrapper Python module.
Link: https://lkml.kernel.org/r/20240625180538.73134-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
tools/testing/selftests/damon/_damon_sysfs.py | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py
index 17352b9d204dc..6e136dc3df195 100644
--- a/tools/testing/selftests/damon/_damon_sysfs.py
+++ b/tools/testing/selftests/damon/_damon_sysfs.py
@@ -481,6 +481,25 @@ class Kdamond:
goal.effective_bytes = int(content)
return None
+ def commit(self):
+ nr_contexts_file = os.path.join(self.sysfs_dir(),
+ 'contexts', 'nr_contexts')
+ content, err = read_file(nr_contexts_file)
+ if err is not None:
+ return err
+ if int(content) != len(self.contexts):
+ err = write_file(nr_contexts_file, '%d' % len(self.contexts))
+ if err is not None:
+ return err
+
+ for context in self.contexts:
+ err = context.stage()
+ if err is not None:
+ return err
+ err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'commit')
+ return err
+
+
def commit_schemes_quota_goals(self):
for context in self.contexts:
for scheme in context.schemes:
--
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