From: Ridong Chen <ridong.chen@linux.dev>
To: Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Shakeel Butt <shakeel.butt@linux.dev>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Muchun Song <muchun.song@linux.dev>,
David Hildenbrand <david@kernel.org>,
Qi Zheng <qi.zheng@linux.dev>, Lorenzo Stoakes <ljs@kernel.org>,
Kairui Song <kasong@tencent.com>, Barry Song <baohua@kernel.org>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>,
Chris Down <chris@chrisdown.name>, Tejun Heo <tj@kernel.org>,
Yu Zhao <yuzhao@google.com>,
cgroups@vger.kernel.org (open list:CONTROL GROUP - MEMORY
RESOURCE CONTROLLER (MEMCG)),
linux-mm@kvack.org (open list:CONTROL GROUP - MEMORY RESOURCE
CONTROLLER (MEMCG)),
linux-kernel@vger.kernel.org, Ridong Chen <ridong.chen@linux.dev>,
Ridong Chen <chenridong@xiaomi.com>
Subject: [PATCH 0/2] mm/mglru: fix ineffective memory protection for non-kswapd reclaim
Date: Fri, 28 Aug 2026 17:24:30 +0800 [thread overview]
Message-ID: <20260828092432.1257917-1-ridong.chen@linux.dev> (raw)
From: Ridong Chen <chenridong@xiaomi.com>
This series fixes memory.min/low being silently bypassed for MGLRU
during non-kswapd global reclaim (global direct reclaim and root-level
memory.reclaim).
Patch 2 is the actual fix. Patch 1 is a prerequisite: an integer overflow
in effective_protection(), spotted by the sashiko review tool, which
patch 2's new caller would also be exposed to.
Ridong Chen (2):
mm/page_counter: avoid integer overflow in effective_protection()
mm/mglru: fix ineffective memory protection for non-kswapd reclaim
include/linux/memcontrol.h | 11 +++++++++++
mm/memcontrol.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
mm/page_counter.c | 10 ++++++----
mm/vmscan.c | 8 +++++++-
4 files changed, 69 insertions(+), 5 deletions(-)
--
2.43.0
next reply other threads:[~2026-08-28 9:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-28 9:24 Ridong Chen [this message]
2026-08-28 9:24 ` [PATCH 1/2] mm/page_counter: avoid integer overflow in effective_protection() Ridong Chen
2026-08-28 9:24 ` [PATCH 2/2] mm/mglru: fix ineffective memory protection for non-kswapd reclaim Ridong Chen
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