+ docs-mm-damon-design-difference-between-watermarks-and-nr_snapshots.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: docs/mm/damon/design: difference between watermarks and nr_snapshots
has been added to the -mm mm-new branch.  Its filename is
     docs-mm-damon-design-difference-between-watermarks-and-nr_snapshots.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-mm-damon-design-difference-between-watermarks-and-nr_snapshots.patch

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

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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------------------------------------------------------
From: Liew Rui Yan <aethernet65535@gmail.com>
Subject: docs/mm/damon/design: difference between watermarks and nr_snapshots
Date: Mon, 31 Aug 2026 08:02:25 -0700

Explain the difference between nr_snapshots reaches max_nr_snapshots and
watermarks.

Link: https://lore.kernel.org/20260831150227.83416-3-sj@kernel.org
Signed-off-by: Liew Rui Yan <aethernet65535@gmail.com>
Signed-off-by: SJ Park <sj@kernel.org>
Reviewed-by: SJ Park <sj@kernel.org>
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: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/mm/damon/design.rst |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/Documentation/mm/damon/design.rst~docs-mm-damon-design-difference-between-watermarks-and-nr_snapshots
+++ a/Documentation/mm/damon/design.rst
@@ -872,7 +872,8 @@ the action to the region will fail.
 
 Unlike normal stats, ``max_nr_snapshots`` is set by users.  If it is set as
 non-zero and ``nr_snapshots`` be same to or greater than ``nr_snapshots``, the
-scheme is deactivated.
+scheme is deactivated.  Note that, unlike watermarks, even if a scheme's
+``nr_snapshots`` reaches ``max_nr_snapshots``, monitoring will not stop.
 
 To know how user-space can read the stats via :ref:`DAMON sysfs interface
 <sysfs_interface>`, refer to :ref:s`stats <sysfs_stats>` part of the
_

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

docs-mm-damon-design-accurate-semantics-of-nr_snapshots.patch
docs-mm-damon-design-difference-between-watermarks-and-nr_snapshots.patch
docs-mm-damon-design-fix-typo-of-max_nr_snapshots.patch