[merged mm-stable] selftests-damon-_damon_sysfs-support-kdamond-refresh_ms.patch removed from -mm tree

The quilt patch titled
     Subject: selftests/damon/_damon_sysfs: support kdamond refresh_ms
has been removed from the -mm tree.  Its filename was
     selftests-damon-_damon_sysfs-support-kdamond-refresh_ms.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Ruslan Valiyev <[email protected]>
Subject: selftests/damon/_damon_sysfs: support kdamond refresh_ms
Date: Mon, 29 Jun 2026 07:49:25 -0700

Patch series "selftests/damon: test kdamond refresh_ms", v2.

The kdamond 'refresh_ms' sysfs file makes DAMON periodically update its
read-only sysfs files (DAMOS stats, tuned monitoring intervals and the
kdamond pid) on its own, so users don't have to write update keywords such
as 'update_schemes_stats' to the 'state' file.  It has no selftest
coverage.

The first patch adds refresh_ms support to the _damon_sysfs.py test
control module.  The second adds a test that sets refresh_ms and confirms
a scheme's stats are updated under sysfs without an explicit update
request; the test skips on kernels that predate the refresh_ms file.

Tested on current mainline under a DAMON-enabled kernel: the new test
passes and the existing DAMON selftests show no new failures.


This patch (of 2):

The Kdamond class has no way to set the kdamond-level 'refresh_ms' sysfs
file, which makes DAMON periodically update the read-only sysfs files
(DAMOS stats, tuned monitoring intervals and the kdamond pid) on its own.

Add a 'refresh_ms' parameter to Kdamond.  When it is set (including to
zero, to disable the periodic update), write it before turning the kdamond
on, so tests can exercise the auto-update behavior.  Leaving it unset
keeps the previous behavior of not touching the file, so callers running
against kernels without the feature are unaffected.

Link: https://lore.kernel.org/[email protected]
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Ruslan Valiyev <[email protected]>
Reviewed-by: SJ Park <[email protected]>
Signed-off-by: SJ Park <[email protected]>
Cc: Shuah Khan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 tools/testing/selftests/damon/_damon_sysfs.py |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/damon/_damon_sysfs.py~selftests-damon-_damon_sysfs-support-kdamond-refresh_ms
+++ a/tools/testing/selftests/damon/_damon_sysfs.py
@@ -698,12 +698,14 @@ class DamonCtx:
 class Kdamond:
     state = None
     pid = None
+    refresh_ms = None
     contexts = None
     idx = None      # index of this kdamond between siblings
     kdamonds = None # parent
 
-    def __init__(self, contexts=[]):
+    def __init__(self, contexts=[], refresh_ms=None):
         self.contexts = contexts
+        self.refresh_ms = refresh_ms
         for idx, context in enumerate(self.contexts):
             context.idx = idx
             context.kdamond = self
@@ -726,6 +728,11 @@ class Kdamond:
             err = context.stage()
             if err is not None:
                 return err
+        if self.refresh_ms is not None:
+            err = write_file(os.path.join(self.sysfs_dir(), 'refresh_ms'),
+                             '%d' % self.refresh_ms)
+            if err is not None:
+                return err
         err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'on')
         if err is not None:
             return err
_

Patches currently in -mm which might be from [email protected] are