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Message-ID: <20230711204537.04cb1124@kernel.org>
Date: Tue, 11 Jul 2023 20:45:37 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Abel Wu <wuyun.abel@...edance.com>
Cc: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
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>,
Michal Hocko <mhocko@...e.com>,
Alexei Starovoitov <ast@...nel.org>,
linux-kernel@...r.kernel.org (open list),
netdev@...r.kernel.org (open list:NETWORKING [GENERAL]),
cgroups@...r.kernel.org (open list:CONTROL GROUP - MEMORY RESOURCE
CONTROLLER (MEMCG)),
linux-mm@...ck.org (open list:CONTROL GROUP - MEMORY RESOURCE
CONTROLLER (MEMCG))
Subject: Re: [PATCH RESEND net-next 1/2] net-memcg: Scopify the indicators
of sockmem pressure
On Tue, 11 Jul 2023 20:41:43 +0800 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.
Eric Dumazet is currently AFK, can we wait for him to return
(in about a week) before merging?
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