linux-kernel - Re: [RFC v1 1/2] um: drivers: remove support for UML_NET_PCAP

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Date:   Tue, 10 Dec 2019 07:14:40 +0000
From:   Anton Ivanov <anton.ivanov@...bridgegreys.com>
To:     Richard Weinberger <richard@....at>,
        Brendan Higgins <brendanhiggins@...gle.com>
Cc:     Johannes Berg <johannes.berg@...el.com>,
        Jeff Dike <jdike@...toit.com>,
        linux-um <linux-um@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        davidgow <davidgow@...gle.com>
Subject: Re: [RFC v1 1/2] um: drivers: remove support for UML_NET_PCAP

On 10/12/2019 00:02, Richard Weinberger wrote:
> ----- Ursprüngliche Mail -----
>> Von: "Brendan Higgins" <brendanhiggins@...gle.com>
>>> IMHO we should at least mark them as "obsolete" and start preparing to
>>> remove them.
>>
>> Alright, I will send a patch out which marks the other network drivers
>> as "obsolete".
>>
>> Clarification: Should I mark all UML network devices as "obsolete"
>> except for NET_VECTOR? Daemon and MCAST looked to me (I am not a
>> networking expert), like they might not be covered by vector.
> 
> No. Why?
> 
> Thanks,
> //richard
> 
> _______________________________________________
> linux-um mailing list
> linux-um@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-um
> 
At least pcap and vde are maintenance issues. They do not even build today.

Off the top of my head, daemon needs fixes to the switch - it has an 
O(n) performance hit for n="number of ports" as well as a few other issues.

Tap has a fully functional replacement

Pcap has a fully functional replacement

mcast for 2 instances is functionally equivalent to running l2tp or gre 
back-to-back.

IMHO we can start marking some of them as obsolete.

-- 
Anton R. Ivanov
Cambridgegreys Limited. Registered in England. Company Number 10273661
https://www.cambridgegreys.com/

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