netdev - Re: [PATCH RFC net-next 1/4] ipv4: fib_rules: support match on sport, dport and ip proto

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Message-ID: <b1690508-f260-f1d1-b562-6553a03f5c9d@cumulusnetworks.com>
Date:   Mon, 12 Feb 2018 14:07:17 -0700
From:   David Ahern <dsa@...ulusnetworks.com>
To:     David Miller <davem@...emloft.net>, eric.dumazet@...il.com
Cc:     roopa@...ulusnetworks.com, netdev@...r.kernel.org,
        nikolay@...ulusnetworks.com
Subject: Re: [PATCH RFC net-next 1/4] ipv4: fib_rules: support match on sport,
 dport and ip proto

On 2/12/18 2:05 PM, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Mon, 12 Feb 2018 12:49:33 -0800
> 
>> Any setup with about 20 rules to be evaluated (per packet cost) will
>> feel the pain...
>>
>> I wonder if we could JIT/eBPF this thing.

I had the same comments -- overhead and ebpf and rules, but ...

> 
> That's true for the software implementation angle.
> 
> But I bet anyone actually using this thing will get it hardware
> offloaded.
> 

what Dave said. ;-)