+ memcg-remove-mem_cgroup-soft_limit.patch added to mm-new branch

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

The patch titled
     Subject: memcg: remove mem_cgroup->soft_limit
has been added to the -mm mm-new branch.  Its filename is
     memcg-remove-mem_cgroup-soft_limit.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/memcg-remove-mem_cgroup-soft_limit.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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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: Shakeel Butt <shakeel.butt@linux.dev>
Subject: memcg: remove mem_cgroup->soft_limit
Date: Tue, 11 Aug 2026 13:32:02 -0700

Nothing reads it anymore, so the field and the helper that reset it on css
alloc and css reset can go.

Link: https://lore.kernel.org/20260811203203.3456029-9-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/memcontrol.h |    2 --
 mm/memcontrol-v1.h         |    6 ------
 mm/memcontrol.c            |    2 --
 3 files changed, 10 deletions(-)

--- a/include/linux/memcontrol.h~memcg-remove-mem_cgroup-soft_limit
+++ a/include/linux/memcontrol.h
@@ -280,8 +280,6 @@ struct mem_cgroup {
 
 	struct memcg1_events_percpu __percpu *events_percpu;
 
-	unsigned long soft_limit;
-
 	/* protected by memcg_oom_lock */
 	bool oom_lock;
 	int under_oom;
--- a/mm/memcontrol.c~memcg-remove-mem_cgroup-soft_limit
+++ a/mm/memcontrol.c
@@ -4241,7 +4241,6 @@ mem_cgroup_css_alloc(struct cgroup_subsy
 		return ERR_CAST(memcg);
 
 	page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX);
-	memcg1_soft_limit_reset(memcg);
 #ifdef CONFIG_ZSWAP
 	memcg->zswap_max = PAGE_COUNTER_MAX;
 	WRITE_ONCE(memcg->zswap_writeback, true);
@@ -4448,7 +4447,6 @@ static void mem_cgroup_css_reset(struct
 	page_counter_set_min(&memcg->memory, 0);
 	page_counter_set_low(&memcg->memory, 0);
 	page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX);
-	memcg1_soft_limit_reset(memcg);
 	page_counter_set_high(&memcg->swap, PAGE_COUNTER_MAX);
 	memcg_wb_domain_size_changed(memcg);
 }
--- a/mm/memcontrol-v1.h~memcg-remove-mem_cgroup-soft_limit
+++ a/mm/memcontrol-v1.h
@@ -42,11 +42,6 @@ void memcg1_free_events(struct mem_cgrou
 
 void memcg1_memcg_init(struct mem_cgroup *memcg);
 
-static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg)
-{
-	WRITE_ONCE(memcg->soft_limit, PAGE_COUNTER_MAX);
-}
-
 struct cgroup_taskset;
 void memcg1_css_offline(struct mem_cgroup *memcg);
 
@@ -97,7 +92,6 @@ static inline bool memcg1_alloc_events(s
 static inline void memcg1_free_events(struct mem_cgroup *memcg) {}
 
 static inline void memcg1_memcg_init(struct mem_cgroup *memcg) {}
-static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) {}
 static inline void memcg1_css_offline(struct mem_cgroup *memcg) {}
 
 static inline bool memcg1_oom_prepare(struct mem_cgroup *memcg, bool *locked)
_

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

memcg-clear-flushing_cached_charge-on-cpu-offline.patch
memcg-trim-the-per-cpu-charge-stock-instead-of-draining-it.patch
memcg-remove-v1-soft-limit-reclaim.patch
memcg-remove-mem_cgroup_shrink_node.patch
memcg-remove-the-soft-limit-reclaim-tracepoints.patch
memcg-remove-the-soft-limit-rbtree.patch
memcg-remove-lru_gen_soft_reclaim.patch
memcg-remove-the-per-node-soft-limit-tree-fields.patch
memcg-remove-mem_cgroup-soft_limit.patch
memcg-simplify-v1-event-ratelimiting.patch