netdev - Re: [PATCH RFC 0/4] net: add bpfilter

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Date:   Mon, 19 Feb 2018 16:37:57 +0100 (CET)
From:   Jan Engelhardt <jengelh@...i.de>
To:     David Miller <davem@...emloft.net>
cc:     laforge@...monks.org, daniel@...earbox.net, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, alexei.starovoitov@...il.com
Subject: Re: [PATCH RFC 0/4] net: add bpfilter

On Monday 2018-02-19 16:32, David Miller wrote:

>From: Harald Welte <laforge@...monks.org>
>Date: Mon, 19 Feb 2018 16:23:21 +0100
>
>> Also, as long as legacy ip_tables/x_tables is still in the kernel, you
>> can still run your old userspace against that old implementation in the
>> kernel.
>
>But without offloading, and the various other benefits which I have
>tried to clearly explain to both you and Florian.

Which is actually the business model to get people *off* the old ABI in 
reasonable time. Otherwise, we would have to ask ourselves why we have 
not yet enhanced /dev/raw with mmap and whatnot.