+ selftests-damon-_damon_sysfs-implement-updat_schemes_tried_bytes-command.patch added to mm-unstable branch

+ selftests-damon-_damon_sysfs-implement-updat_schemes_tried_bytes-command.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests/damon/_damon_sysfs: implement updat_schemes_tried_bytes command
has been added to the -mm mm-unstable branch.  Its filename is
     selftests-damon-_damon_sysfs-implement-updat_schemes_tried_bytes-command.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-damon-_damon_sysfs-implement-updat_schemes_tried_bytes-command.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: selftests/damon/_damon_sysfs: implement updat_schemes_tried_bytes command
Date: Tue, 12 Dec 2023 19:48:08 +0000

Implement update_schemes_tried_bytes command of DAMON sysfs interface in
_damon_sysfs.py.  It is not only making the update, but also read the
updated value from the sysfs interface and store it in the Kdamond python
objects so that the user of the module can easily get the value.

Link: https://lkml.kernel.org/r/20231212194810.54457-4-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 |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/tools/testing/selftests/damon/_damon_sysfs.py~selftests-damon-_damon_sysfs-implement-updat_schemes_tried_bytes-command
+++ a/tools/testing/selftests/damon/_damon_sysfs.py
@@ -76,6 +76,7 @@ class Damos:
     # todo: Support quotas, watermarks, stats, tried_regions
     idx = None
     context = None
+    tried_bytes = None
 
     def __init__(self, action='stat', access_pattern=DamosAccessPattern()):
         self.action = action
@@ -284,6 +285,19 @@ class Kdamond:
         err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'on')
         return err
 
+    def update_schemes_tried_bytes(self):
+        err = write_file(os.path.join(self.sysfs_dir(), 'state'),
+                'update_schemes_tried_bytes')
+        if err != None:
+            return err
+        for context in self.contexts:
+            for scheme in context.schemes:
+                content, err = read_file(os.path.join(scheme.sysfs_dir(),
+                    'tried_regions', 'total_bytes'))
+                if err != None:
+                    return err
+                scheme.tried_bytes = int(content)
+
 class Kdamonds:
     kdamonds = []
 
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-core-make-damon_start-waits-until-kdamond_fn-starts.patch
selftests-damon-implement-a-python-module-for-test-purpose-damon-sysfs-controls.patch
selftests-damon-_damon_sysfs-implement-kdamonds-start-function.patch
selftests-damon-_damon_sysfs-implement-updat_schemes_tried_bytes-command.patch
selftests-damon-add-a-test-for-update_schemes_tried_regions-sysfs-command.patch
selftests-damon-add-a-test-for-update_schemes_tried_regions-hang-bug.patch