netdev - Re: [PATCH RESEND net-next 1/2] net-memcg: Scopify the indicators of sockmem pressure

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Date: Thu, 20 Jul 2023 15:58:49 +0800
From: Abel Wu <wuyun.abel@...edance.com>
To: "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Johannes Weiner <hannes@...xchg.org>,
 Michal Hocko <mhocko@...nel.org>, Roman Gushchin <roman.gushchin@...ux.dev>,
 Shakeel Butt <shakeelb@...gle.com>, Muchun Song <muchun.song@...ux.dev>,
 Andrew Morton <akpm@...ux-foundation.org>, David Ahern <dsahern@...nel.org>,
 Yosry Ahmed <yosryahmed@...gle.com>,
 "Matthew Wilcox (Oracle)" <willy@...radead.org>, Yu Zhao
 <yuzhao@...gle.com>, Kefeng Wang <wangkefeng.wang@...wei.com>,
 Yafang Shao <laoar.shao@...il.com>, Kuniyuki Iwashima <kuniyu@...zon.com>,
 Martin KaFai Lau <martin.lau@...nel.org>,
 Alexander Mikhalitsyn <alexander@...alicyn.com>,
 Breno Leitao <leitao@...ian.org>, David Howells <dhowells@...hat.com>,
 Jason Xing <kernelxing@...cent.com>, Xin Long <lucien.xin@...il.com>
Cc: Michal Hocko <mhocko@...e.com>, Alexei Starovoitov <ast@...nel.org>,
 open list <linux-kernel@...r.kernel.org>,
 "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
 "open list:CONTROL GROUP - MEMORY RESOURCE CONTROLLER (MEMCG)"
 <cgroups@...r.kernel.org>,
 "open list:CONTROL GROUP - MEMORY RESOURCE CONTROLLER (MEMCG)"
 <linux-mm@...ck.org>
Subject: Re: [PATCH RESEND net-next 1/2] net-memcg: Scopify the indicators of
 sockmem pressure

Gentle ping :)

On 7/11/23 8:41 PM, Abel Wu wrote:
> Now there are two indicators of socket memory pressure sit inside
> struct mem_cgroup, socket_pressure and tcpmem_pressure.
> 
> When in legacy mode aka. cgroupv1, the socket memory is charged
> into a separate counter memcg->tcpmem rather than ->memory, so
> the reclaim pressure of the memcg has nothing to do with socket's
> pressure at all. While for default mode, the ->tcpmem is simply
> not used.
> 
> So {socket,tcpmem}_pressure are only used in default/legacy mode
> respectively. This patch fixes the pieces of code that make mixed
> use of both.
> 
> Signed-off-by: Abel Wu <wuyun.abel@...edance.com>
> ---
>   include/linux/memcontrol.h | 4 ++--
>   mm/vmpressure.c            | 8 ++++++++
>   2 files changed, 10 insertions(+), 2 deletions(-)
>