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: <20180212.160510.620630476824737121.davem@davemloft.net>
Date:   Mon, 12 Feb 2018 16:05:10 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     eric.dumazet@...il.com
Cc:     roopa@...ulusnetworks.com, netdev@...r.kernel.org,
        dsa@...ulusnetworks.com, nikolay@...ulusnetworks.com
Subject: Re: [PATCH RFC net-next 1/4] ipv4: fib_rules: support match on
 sport, dport and ip proto

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.

That's true for the software implementation angle.

But I bet anyone actually using this thing will get it hardware
offloaded.