[merged mm-stable] selftests-damon-stop-kdamond-on-error-exits-of-no-op-commit-test.patch removed from -mm tree

[merged mm-stable] selftests-damon-stop-kdamond-on-error-exits-of-no-op-commit-test.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: selftests/damon: stop kdamond on error exits of no-op commit test
has been removed from the -mm tree.  Its filename was
     selftests-damon-stop-kdamond-on-error-exits-of-no-op-commit-test.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: "Zenghui Yu (Huawei)" <zenghui.yu@linux.dev>
Subject: selftests/damon: stop kdamond on error exits of no-op commit test
Date: Mon, 14 Sep 2026 07:19:46 -0700

Patch series "mm/damon: misc improvements in tests and documents".

Add various improvements to DAMON tests and documents.

Patch 1 and 2 from Zenghui Yu (Huawei) let DAMON selftest to clean up its
state and output after running the tests.  Patch 3 from Eva Kurchatova
makes a few selftest be able to run with Python's safe path mode.  Patch 4
from Kunwu Chan improves coverage of DAMON kunit tests.  Finally, patches
5 and 6 from Liew Rui Yan clarify and fix typos on documents for DAMOS
quota behaviors.

Below are notes that can be removed in the final commit message.

This is a batched repost of DAMON patches that were individually posted. 
Please refer to each patch for changelog.


This patch (of 6):

The sysfs_no_op_commit_break test starts a kdamond via sysfs, but its
error paths (e.g., drgn not installed) exit without stopping it.  The
leaked kdamond then makes subsequent tests, e.g.  lru_sort.sh and
reclaim.sh, skip with "Another kdamond is running".

Wrap the post-start logic in try-finally so that kdamonds.stop() is
executed on every exit path.

Link: https://lore.kernel.org/20260914141952.91465-1-sj@kernel.org
Link: https://lore.kernel.org/20260914141952.91465-2-sj@kernel.org
Fixes: 10725cd2b09a ("selftests/damon: test no-op commit broke DAMON status")
Signed-off-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
Reviewed-by: SJ Park <sj@kernel.org>
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Assisted-by: GLM-5.3 OpenCode
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@davidgow.net>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Eva Kurchatova <eva.kurchatova@virtuozzo.com>
Cc: Kunwu Chan <kunwu.chan@gmail.com>
Cc: Lian Wang <lianux.mm@gmail.com>
Cc: Liew Rui Yan <aethernet65535@gmail.com>
---

 tools/testing/selftests/damon/sysfs_no_op_commit_break.py |   41 +++++-----
 1 file changed, 21 insertions(+), 20 deletions(-)

--- a/tools/testing/selftests/damon/sysfs_no_op_commit_break.py~selftests-damon-stop-kdamond-on-error-exits-of-no-op-commit-test
+++ a/tools/testing/selftests/damon/sysfs_no_op_commit_break.py
@@ -47,26 +47,27 @@ def main():
         print('kdamond start failed: %s' % err)
         exit(1)
 
-    before_commit_status, err = \
-        dump_damon_status_dict(kdamonds.kdamonds[0].pid)
-    if err is not None:
-        print('before-commit status dump failed: %s' % err)
-        exit(1)
-
-    kdamonds.kdamonds[0].commit()
-
-    after_commit_status, err = \
-        dump_damon_status_dict(kdamonds.kdamonds[0].pid)
-    if err is not None:
-        print('after-commit status dump failed: %s' % err)
-        exit(1)
-
-    if before_commit_status != after_commit_status:
-        print(f'before: {json.dumps(before_commit_status, indent=2)}')
-        print(f'after: {json.dumps(after_commit_status, indent=2)}')
-        exit(1)
-
-    kdamonds.stop()
+    try:
+        before_commit_status, err = \
+            dump_damon_status_dict(kdamonds.kdamonds[0].pid)
+        if err is not None:
+            print('before-commit status dump failed: %s' % err)
+            exit(1)
+
+        kdamonds.kdamonds[0].commit()
+
+        after_commit_status, err = \
+            dump_damon_status_dict(kdamonds.kdamonds[0].pid)
+        if err is not None:
+            print('after-commit status dump failed: %s' % err)
+            exit(1)
+
+        if before_commit_status != after_commit_status:
+            print(f'before: {json.dumps(before_commit_status, indent=2)}')
+            print(f'after: {json.dumps(after_commit_status, indent=2)}')
+            exit(1)
+    finally:
+        kdamonds.stop()
 
 if __name__ == '__main__':
     main()
_

Patches currently in -mm which might be from zenghui.yu@linux.dev are

mm-damon-api-remove-unused-nr_damos_-enumerators.patch
selftests-mm-fix-uffd-move-pmd-test-crash-on-64k-base-page-systems.patch