[merged mm-stable] mm-memcontrol-use-memcg_kmem_enabled-in-count_objcg_event.patch removed from -mm tree

[merged mm-stable] mm-memcontrol-use-memcg_kmem_enabled-in-count_objcg_event.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: memcontrol: use memcg_kmem_enabled in count_objcg_event
has been removed from the -mm tree.  Its filename was
     mm-memcontrol-use-memcg_kmem_enabled-in-count_objcg_event.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: Kairui Song <kasong@tencent.com>
Subject: mm: memcontrol: use memcg_kmem_enabled in count_objcg_event
Date: Tue, 20 Sep 2022 02:06:33 +0800

Patch series "mm: memcontrol: cleanup and optimize for two accounting
params", v2.


This patch (of 2):

There are currently two helpers for checking if cgroup kmem
accounting is enabled:

- mem_cgroup_kmem_disabled
- memcg_kmem_enabled

mem_cgroup_kmem_disabled is a simple helper that returns true
if cgroup.memory=nokmem is specified, otherwise returns false.

memcg_kmem_enabled is a bit different, it returns true if
cgroup.memory=nokmem is not specified and there was at least one
non-root memory control enabled cgroup ever created. This help improve
performance when kmem accounting was not actually activated. And it's
optimized with static branch.

The usage of mem_cgroup_kmem_disabled is for sub-systems that need to
preallocate data for kmem accounting since they could be initialized
before kmem accounting is activated. But count_objcg_event doesn't
need that, so using memcg_kmem_enabled is better here.

Link: https://lkml.kernel.org/r/20220919180634.45958-1-ryncsn@gmail.com
Link: https://lkml.kernel.org/r/20220919180634.45958-2-ryncsn@gmail.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Acked-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/memcontrol.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/memcontrol.h~mm-memcontrol-use-memcg_kmem_enabled-in-count_objcg_event
+++ a/include/linux/memcontrol.h
@@ -1778,7 +1778,7 @@ static inline void count_objcg_event(str
 {
 	struct mem_cgroup *memcg;
 
-	if (mem_cgroup_kmem_disabled())
+	if (!memcg_kmem_enabled())
 		return;
 
 	rcu_read_lock();
_

Patches currently in -mm which might be from kasong@tencent.com are