From: Ridong Chen <ridong.chen@linux.dev>
To: Tao Cui <cui.tao@linux.dev>, 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>,
Chris Li <chrisl@kernel.org>, Kairui Song <kasong@tencent.com>
Cc: Muchun Song <muchun.song@linux.dev>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Nhat Pham <nphamcs@gmail.com>, Baoquan He <baoquan.he@linux.dev>,
Barry Song <baohua@kernel.org>,
Youngjun Park <youngjun.park@lge.com>,
David Hildenbrand <david@kernel.org>,
Qi Zheng <qi.zheng@linux.dev>, Lorenzo Stoakes <ljs@kernel.org>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>,
Davidlohr Bueso <dave@stgolabs.net>,
cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Ridong Chen <chenridong@xiaomi.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v2 2/2] mm: vmscan: fix node reclaim ignoring swappiness parameter
Date: Thu, 16 Jul 2026 16:23:31 +0800 [thread overview]
Message-ID: <e1cb2692-166d-47d9-9296-d49f208f7290@linux.dev> (raw)
In-Reply-To: <c5efad07-7188-4f18-bdc3-fceb8aedc9b8@linux.dev>
On 7/16/2026 2:06 PM, Tao Cui wrote:
> Hi Ridong,
>
> Reproduced the bug and verified the fix in a QEMU x86_64 guest with
> CONFIG_MEMCG disabled. Global vm.swappiness pinned to 1, then:
>
> echo "64M swappiness=<x>" > /sys/devices/system/node/node0/reclaim
>
> swappiness= | buggy (anon/file) | patched (anon/file)
> ----------- | -------------------- | --------------------
> max | 0 / 16385 | 16292 / 0
> 200 | 2 / 16384 | 16837 / 0
> 1 | 0 / 16386 | 0 / 16467
>
> Unpatched ignores the swappiness arg (always file); patched honors it.
> Matches the commit message.
>
> Tested-by: Song Hu <husong@kylinos.cn>
> Reviewed-by: Song Hu <husong@kylinos.cn>
>
Thanks.
--
Best regards
Ridong
prev parent reply other threads:[~2026-07-16 8:23 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-16 3:17 [PATCH v2 0/2] mm: fix node reclaim swappiness handling Ridong
2026-07-16 3:17 ` [PATCH v2 1/2] memcg: move mem_cgroup_swappiness and vm_swappiness to mm/swap.h Ridong
2026-07-16 6:06 ` Tao Cui
2026-07-16 7:14 ` Barry Song
2026-07-16 3:17 ` [PATCH v2 2/2] mm: vmscan: fix node reclaim ignoring swappiness parameter Ridong
2026-07-16 3:25 ` Qi Zheng
2026-07-16 3:58 ` Qi Zheng
2026-07-16 8:21 ` Ridong Chen
2026-07-16 8:42 ` Qi Zheng
2026-07-16 11:17 ` Ridong Chen
2026-07-16 6:06 ` Tao Cui
2026-07-16 8:23 ` Ridong Chen [this message]
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