linux-kernel - [PATCH 07/22] selftests/damon/_damon_sysfs: support DAMOS target

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Message-Id: <20250720171652.92309-8-sj@kernel.org>
Date: Sun, 20 Jul 2025 10:16:37 -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 07/22] selftests/damon/_damon_sysfs: support DAMOS target_nid setup

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface
control.  Add support of DAMOS action destination target_nid setup for
more tests.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 tools/testing/selftests/damon/_damon_sysfs.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py
index 2d95ab564885..70860d925503 100644
--- a/tools/testing/selftests/damon/_damon_sysfs.py
+++ b/tools/testing/selftests/damon/_damon_sysfs.py
@@ -395,6 +395,7 @@ class Damos:
     ops_filters = None
     filters = None
     apply_interval_us = None
+    target_nid = None
     dests = None
     idx = None
     context = None
@@ -404,7 +405,7 @@ class Damos:
 
     def __init__(self, action='stat', access_pattern=DamosAccessPattern(),
                  quota=DamosQuota(), watermarks=DamosWatermarks(),
-                 core_filters=[], ops_filters=[], filters=[],
+                 core_filters=[], ops_filters=[], filters=[], target_nid=0,
                  dests=DamosDests(), apply_interval_us=0):
         self.action = action
         self.access_pattern = access_pattern
@@ -423,6 +424,7 @@ class Damos:
         self.filters = DamosFilters(name='filters', filters=filters)
         self.filters.scheme = self
 
+        self.target_nid = target_nid
         self.dests = dests
         self.dests.scheme = self
 
@@ -462,6 +464,11 @@ class Damos:
         if err is not None:
             return err
 
+        err = write_file(os.path.join(self.sysfs_dir(), 'target_nid'), '%d' %
+                         self.target_nid)
+        if err is not None:
+            return err
+
         err = self.dests.stage()
         if err is not None:
             return err
-- 
2.39.5