netdev - Re: [PATCH] net/smc: Add autocork support

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Message-ID: <bc3252a3-5a84-63d4-dfc5-009f602a5bec@linux.ibm.com>
Date:   Wed, 23 Feb 2022 19:57:31 +0100
From:   Karsten Graul <kgraul@...ux.ibm.com>
To:     dust.li@...ux.alibaba.com,
        Hendrik Brueckner <brueckner@...ux.ibm.com>
Cc:     Stefan Raspl <raspl@...ux.ibm.com>,
        Tony Lu <tonylu@...ux.alibaba.com>, kuba@...nel.org,
        davem@...emloft.net, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: [PATCH] net/smc: Add autocork support

On 19/02/2022 00:42, dust.li wrote:
> On Fri, Feb 18, 2022 at 05:03:56PM +0100, Karsten Graul wrote:
>> Right now for me it looks like there is no way to use netlink for container runtime
>> configuration, which is a pity.
>> We continue our discussions about this in the team, and also here on the list.
> 
> Many thanks for your time on this topic !

We checked more specs (like Container Network Interface (CNI) Specification) 
but all we found uses sysctl at the end. There is lot of infrastructure 
to use sysctls in a container environment.

Establishing netlink-like controls for containers is by far out of our scope, and
would take a long time until it would be available in the popular projects.

So at the moment I see no alternative to an additional sysctl interface in the 
SMC module that provides controls which are useful in container environments.