From: Johannes Weiner <hannes@cmpxchg.org>
To: Ridong <ridong.chen@linux.dev>
Cc: 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>,
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>,
cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Ridong Chen <chenridong@xiaomi.com>
Subject: Re: [PATCH -next] memcg: move mem_cgroup_swappiness to memcontrol.h
Date: Fri, 10 Jul 2026 08:21:45 -0400 [thread overview]
Message-ID: <alDj2VzbpxT-I74e@cmpxchg.org> (raw)
In-Reply-To: <20260710111224.2355668-1-ridong.chen@linux.dev>
On Fri, Jul 10, 2026 at 07:12:24PM +0800, Ridong wrote:
> From: Ridong Chen <chenridong@xiaomi.com>
>
> The per-memcg swappiness knob is v1-only; v2 always uses global
> vm_swappiness and ignores the per-cgroup field.
>
> Guard memcg->swappiness with CONFIG_MEMCG_V1, and move the helper
> to memcontrol.h where it belongs.
>
> No functional change for v1; v2-only kernels drop the unused field.
>
> Signed-off-by: Ridong Chen <chenridong@xiaomi.com>
Nice.
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
next prev parent reply other threads:[~2026-07-10 12:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-10 11:12 [PATCH -next] memcg: move mem_cgroup_swappiness to memcontrol.h Ridong
2026-07-10 12:21 ` Johannes Weiner [this message]
2026-07-11 9:17 ` Ridong Chen
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