netdev - Re: [RFC PATCH net-next-2.6] gro: drivers should feed GRO only with TCP packets

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Message-Id: <20100901.104805.35816252.davem@davemloft.net>
Date:	Wed, 01 Sep 2010 10:48:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [RFC PATCH net-next-2.6] gro: drivers should feed GRO only
 with TCP packets

From: Stephen Hemminger <shemminger@...tta.com>
Date: Wed, 1 Sep 2010 10:42:35 -0700

> There was talk of doing GRO for UDP as well but it never
> got implemented. 

I suppose the most direct application would be for IP fragmentation.

In fact I could see that working very well.

But for non-fragmented UDP... I can't see much value to that.

We'd have to preserve the packet boundaries, and process each chunk of
data as one packet at a time within those boundaries, to retain
datagram recvmsg() semantics.
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