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Date:	Sun, 8 Nov 2015 18:57:10 +0800
From:	Herbert Xu <>
To:	"Jason A. Donenfeld" <>
Cc:	Maciej ┼╗enczykowski <>,
	Tom Herbert <>,
	Jiri Benc <>, Netdev <>,
	LKML <>
Subject: Re: GSO with udp_tunnel_xmit_skb

On Sun, Nov 08, 2015 at 11:36:53AM +0100, Jason A. Donenfeld wrote:
> Wouldn't there be some significant savings from bundling together
> several UDP packets meant for the same destination, and sending those
> all as one super-packet, so they don't each have to traverse the whole
> networking and netfilter stack? By asking that question, it doesn't
> feel as though I've come up with a new idea; is there a reason why
> that isn't implemented or why (if) it was rejected?

UDP carries no ordering information so this doesn't work.

Email: Herbert Xu <>
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