[merged mm-stable] mm-memcg-reset-oom_group-in-css_reset.patch removed from -mm tree

[merged mm-stable] mm-memcg-reset-oom_group-in-css_reset.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: memcg: reset oom_group in css_reset
has been removed from the -mm tree.  Its filename was
     mm-memcg-reset-oom_group-in-css_reset.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: Jiayuan Chen <jiayuan.chen@shopee.com>
Subject: mm: memcg: reset oom_group in css_reset
Date: Fri, 3 Jul 2026 14:38:24 +0800

memory.oom.group defaults to disabled, but css_reset did not clear
memcg->oom_group when a disabled memory css is kept alive by another
controller dependency.

Reset it with the other memory controller policies so a hidden memcg
cannot keep applying stale group OOM kill policy.

Link: https://lore.kernel.org/20260703063826.306878-2-jiayuan.chen@linux.dev
Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Cc: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/memcontrol.c~mm-memcg-reset-oom_group-in-css_reset
+++ a/mm/memcontrol.c
@@ -4362,6 +4362,7 @@ static void mem_cgroup_css_reset(struct
 
 	page_counter_set_max(&memcg->memory, PAGE_COUNTER_MAX);
 	page_counter_set_max(&memcg->swap, PAGE_COUNTER_MAX);
+	WRITE_ONCE(memcg->oom_group, false);
 #ifdef CONFIG_ZSWAP
 	WRITE_ONCE(memcg->zswap_max, PAGE_COUNTER_MAX);
 	WRITE_ONCE(memcg->zswap_writeback, true);
_

Patches currently in -mm which might be from jiayuan.chen@shopee.com are

memcg-bail-out-memoryhigh-when-memcg-is-dying.patch
memcg-bail-out-memorymax-when-memcg-is-dying.patch
memcg-bail-out-proactive-reclaim-when-memcg-is-dying.patch
memcg-v1-bail-out-reclaim-when-memcg-is-dying.patch