[merged mm-stable] docs-mm-damon-design-clarify-when-qt_exceeds-increases.patch removed from -mm tree

[merged mm-stable] docs-mm-damon-design-clarify-when-qt_exceeds-increases.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: Docs/mm/damon/design: clarify when qt_exceeds increases
has been removed from the -mm tree.  Its filename was
     docs-mm-damon-design-clarify-when-qt_exceeds-increases.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: Liew Rui Yan <aethernet65535@gmail.com>
Subject: Docs/mm/damon/design: clarify when qt_exceeds increases
Date: Mon, 14 Sep 2026 07:19:50 -0700

qt_exceeds counts how many times a scheme's quota has been exceeded.

When using the temporal auto-tuning algorithm, the effective size quota
becomes zero once the goal is [over-]achieved.  In this case, the quotas
are still set, so qt_exceeds keeps increasing once per quota reset
interval while the goal stays achieved.

Clarify this behavior in the design document.

Link: https://lore.kernel.org/20260914141952.91465-6-sj@kernel.org
Signed-off-by: Liew Rui Yan <aethernet65535@gmail.com>
Reviewed-by: SJ Park <sj@kernel.org>
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@davidgow.net>
Cc: David Hildenbrand <david@kernel.org>
Cc: Eva Kurchatova <eva.kurchatova@virtuozzo.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kunwu Chan <kunwu.chan@gmail.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lian Wang <lianux.mm@gmail.com>
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: "Zenghui Yu (Huawei)" <zenghui.yu@linux.dev>
---

 Documentation/mm/damon/design.rst |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/Documentation/mm/damon/design.rst~docs-mm-damon-design-clarify-when-qt_exceeds-increases
+++ a/Documentation/mm/damon/design.rst
@@ -696,7 +696,9 @@ There are two such tuning algorithms tha
   fast as possible, using maximum allowed quota, but only for a temporal short
   time.  When the quota is under-achieved, this algorithm keeps tuning quota to
   a maximum allowed one.  Once the quota is [over]-achieved, this sets the
-  quota zero.  Useful for deterministic control required environments.
+  quota zero.  Useful for deterministic control required environments.  Note
+  that the zero quota is a valid quota, and therefore ``qt_exceeds`` :ref:`stat
+  <damon_design_damos_stat>` will keep increasing in this case.
 
 The goal can be specified with five parameters, namely ``target_metric``,
 ``target_value``, ``current_value``, ``nid`` and ``path``.  The auto-tuning
_

Patches currently in -mm which might be from aethernet65535@gmail.com are

mm-damon-tests-core-kunit-add-test-for-unconditionally-skipping-the-last-region.patch