netdev - Re: [patch net-next RFC 00/10] introduce line card support for modular switch

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Message-ID: <2d9674de-9710-3172-3ff7-073634ad1068@gmail.com>
Date:   Mon, 18 Jan 2021 15:55:45 -0700
From:   David Ahern <dsahern@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>, Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, davem@...emloft.net,
        jacob.e.keller@...el.com, roopa@...dia.com, mlxsw@...dia.com
Subject: Re: [patch net-next RFC 00/10] introduce line card support for
 modular switch

On 1/18/21 6:00 AM, Jiri Pirko wrote:
> 
>> Reconfiguring routing is not the end of the world.
> Well, yes, but you don't really want netdevices to come and go then you
> plug in/out cables/modules. That's why we have split implemented as we

And you don't want a routing daemon to use netdevices which are not
valid due to non-existence. Best case with what you want is carrier down
on the LC's netdevices and that destroys routing.

> do. I don't understand why do you think linecards are different.

I still don't get why you expect linecards to be different than any
other hotplug device.