netdev - Re: [PATCH net-next v5 5/5] net/smc: Add global configure for auto fallback by netlink

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Message-ID: <YgOPRh34nUWOqh2C@TonyMac-Alibaba>
Date:   Wed, 9 Feb 2022 17:54:14 +0800
From:   Tony Lu <tonylu@...ux.alibaba.com>
To:     "D. Wythe" <alibuda@...ux.alibaba.com>
Cc:     kgraul@...ux.ibm.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-next v5 5/5] net/smc: Add global configure for auto
 fallback by netlink

On Wed, Feb 09, 2022 at 05:41:50PM +0800, D. Wythe wrote:
> I don't think this is necessary, since we already have socket options. Is
> there any scenario that the socket options and global switch can not cover?
> 
When transparently replacing the whole container's TCP connections, we
cannot touch the user's application, and have to replace their
connections to SMC. It is common for container environment, different
containers will run different applications.

Most of TCP knob is per net-namespace, it could be better for us to do
it from the beginning.

Thanks,
Tony Lu