[merged mm-stable] memcg-remove-the-per-node-soft-limit-tree-fields.patch removed from -mm tree

[merged mm-stable] memcg-remove-the-per-node-soft-limit-tree-fields.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: memcg: remove the per-node soft limit tree fields
has been removed from the -mm tree.  Its filename was
     memcg-remove-the-per-node-soft-limit-tree-fields.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: Shakeel Butt <shakeel.butt@linux.dev>
Subject: memcg: remove the per-node soft limit tree fields
Date: Wed, 2 Sep 2026 10:43:09 -0700

tree_node, usage_in_excess and on_tree only existed for the soft limit
rbtree. They also doubled as the buffer between the read-mostly head of
struct mem_cgroup_per_node and its update-often tail, so replace them
with the explicit padding that CONFIG_MEMCG_V1=n already used.

Link: https://lore.kernel.org/20260902174311.1772372-7-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: T.J. Mercier <tjmercier@google.com>
---

 include/linux/memcontrol.h |   13 -------------
 1 file changed, 13 deletions(-)

--- a/include/linux/memcontrol.h~memcg-remove-the-per-node-soft-limit-tree-fields
+++ a/include/linux/memcontrol.h
@@ -95,20 +95,7 @@ struct mem_cgroup_per_node {
 	struct lruvec_stats			*lruvec_stats;
 	struct shrinker_info __rcu	*shrinker_info;
 
-#ifdef CONFIG_MEMCG_V1
-	/*
-	 * Memcg-v1 only stuff in middle as buffer between read mostly fields
-	 * and update often fields to avoid false sharing. If v1 stuff is
-	 * not present, an explicit padding is needed.
-	 */
-
-	struct rb_node		tree_node;	/* RB tree node */
-	unsigned long		usage_in_excess;/* Set to the value by which */
-						/* the soft limit is exceeded*/
-	bool			on_tree;
-#else
 	CACHELINE_PADDING(_pad1_);
-#endif
 
 	/* Fields which get updated often at the end. */
 	struct lruvec		lruvec;
_

Patches currently in -mm which might be from shakeel.butt@linux.dev are

memcg-move-per-node-objcg-to-the-read-mostly-fields.patch
memcg-split-mem_cgroup_private_id-into-two-fields.patch
memcg-group-the-write-hot-fields-of-struct-mem_cgroup.patch
memcg-group-the-cold-fields-of-struct-mem_cgroup.patch
memcg-group-the-read-mostly-fields-of-struct-mem_cgroup.patch
memcg-group-the-fields-of-struct-mem_cgroup_per_node.patch