netdev - Re: [PATCH v1 net-next 11/13] net-memcg: Add memory.socket

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Message-ID: <CANn89i+mvoZ4rqtow2SRR0ZRB9gS4an9syCLuXyqcW=4-8Ek4g@mail.gmail.com>
Date: Tue, 22 Jul 2025 08:00:31 -0700
From: Eric Dumazet <edumazet@...gle.com>
To: Kuniyuki Iwashima <kuniyu@...gle.com>
Cc: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Neal Cardwell <ncardwell@...gle.com>, Paolo Abeni <pabeni@...hat.com>, 
	Willem de Bruijn <willemb@...gle.com>, Matthieu Baerts <matttbe@...nel.org>, 
	Mat Martineau <martineau@...nel.org>, Johannes Weiner <hannes@...xchg.org>, 
	Michal Hocko <mhocko@...nel.org>, Roman Gushchin <roman.gushchin@...ux.dev>, 
	Shakeel Butt <shakeel.butt@...ux.dev>, Andrew Morton <akpm@...ux-foundation.org>, 
	Simon Horman <horms@...nel.org>, Geliang Tang <geliang@...nel.org>, 
	Muchun Song <muchun.song@...ux.dev>, Kuniyuki Iwashima <kuni1840@...il.com>, netdev@...r.kernel.org, 
	mptcp@...ts.linux.dev, cgroups@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v1 net-next 11/13] net-memcg: Add memory.socket_isolated knob.

On Mon, Jul 21, 2025 at 1:36 PM Kuniyuki Iwashima <kuniyu@...gle.com> wrote:
>
> Some networking protocols have their own global memory accounting,
> and such memory is also charged to memcg as sock in memory.stat.
>
> Such sockets are subject to the global limit, thus affected by a
> noisy neighbour outside the cgroup.
>
> We will decouple the global memory accounting if configured.
>
> Let's add a per-memcg knob to control that.
>
> The value will be saved in each socket when created and will
> persist through the socket's lifetime.
>
> Signed-off-by: Kuniyuki Iwashima <kuniyu@...gle.com>
> ---

Reviewed-by: Eric Dumazet <edumazet@...gle.com>