selftests/damon/_damon_sysfs: support goal_tuner setup

Add support of goal_tuner setup to the test-purpose DAMON sysfs interface
control helper, _damon_sysfs.py.

Link: https://lkml.kernel.org/r/20260310010529.91162-10-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py
index 748778b563cd2d73a054517a675622754344a6eb..2b4df655d9fd013efa5977868246deea826f1343 100644 (file)
--- a/tools/testing/selftests/damon/_damon_sysfs.py
+++ b/tools/testing/selftests/damon/_damon_sysfs.py
@@ -130,15 +130,16 @@ class DamosQuota:
     sz = None                   # size quota, in bytes
     ms = None                   # time quota
     goals = None                # quota goals
+    goal_tuner = None           # quota goal tuner
     reset_interval_ms = None    # quota reset interval
     weight_sz_permil = None
     weight_nr_accesses_permil = None
     weight_age_permil = None
     scheme = None               # owner scheme
 
-    def __init__(self, sz=0, ms=0, goals=None, reset_interval_ms=0,
-                 weight_sz_permil=0, weight_nr_accesses_permil=0,
-                 weight_age_permil=0):
+    def __init__(self, sz=0, ms=0, goals=None, goal_tuner='consist',
+                 reset_interval_ms=0, weight_sz_permil=0,
+                 weight_nr_accesses_permil=0, weight_age_permil=0):
         self.sz = sz
         self.ms = ms
         self.reset_interval_ms = reset_interval_ms
@@ -146,6 +147,7 @@ class DamosQuota:
         self.weight_nr_accesses_permil = weight_nr_accesses_permil
         self.weight_age_permil = weight_age_permil
         self.goals = goals if goals is not None else []
+        self.goal_tuner = goal_tuner
         for idx, goal in enumerate(self.goals):
             goal.idx = idx
             goal.quota = self
@@ -191,6 +193,10 @@ class DamosQuota:
             err = goal.stage()
             if err is not None:
                 return err
+        err = write_file(
+                os.path.join(self.sysfs_dir(), 'goal_tuner'), self.goal_tuner)
+        if err is not None:
+            return err
         return None
 
 class DamosWatermarks: