linux-kernel - Re: [PATCH net-next 3/3] net: core: Namespace-ify sysctl_rmem_max and sysctl_wmem

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Message-ID: <20210120104621.GM19605@breakpoint.cc>
Date:   Wed, 20 Jan 2021 11:46:21 +0100
From:   Florian Westphal <fw@...len.de>
To:     menglong8.dong@...il.com
Cc:     kuba@...nel.org, christian.brauner@...ntu.com, davem@...emloft.net,
        yoshfuji@...ux-ipv6.org, dong.menglong@....com.cn,
        daniel@...earbox.net, gnault@...hat.com, ast@...nel.org,
        nicolas.dichtel@...nd.com, ap420073@...il.com, edumazet@...gle.com,
        pabeni@...hat.com, jakub@...udflare.com, bjorn.topel@...el.com,
        keescook@...omium.org, viro@...iv.linux.org.uk, rdna@...com,
        maheshb@...gle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] net: core: Namespace-ify sysctl_rmem_max
 and sysctl_wmem_max

menglong8.dong@...il.com <menglong8.dong@...il.com> wrote:
> From: Menglong Dong <dong.menglong@....com.cn>
> 
> For now, sysctl_wmem_max and sysctl_rmem_max are globally unified.
> It's not convenient in some case. For example, when we use docker
> and try to control the default udp socket receive buffer for each
> container.
> 
> For that reason, make sysctl_wmem_max and sysctl_rmem_max
> per-namespace.

I think having those values be restricted by init netns is a desirable
property.