netdev - LRO (Large Receice Offload) and UDP

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Message-ID: <dac45061003200415o1fcb1771xb2c43a98c2232c5d@mail.gmail.com>
Date:	Sat, 20 Mar 2010 13:15:34 +0200
From:	Mark Ryden <markryde@...il.com>
To:	netdev@...r.kernel.org
Cc:	themann@...ibm.com
Subject: LRO (Large Receice Offload) and UDP

Hello,

I have a question about LRO ("Large Receive Offload") and I will
appreciate if somebody can answer in short (for me, 2-3 sentences are
enough). I have
noticed that LRO handles only TCP packets. Thus, the TCP flag is checked and
non TCP packets are not handled by LRO.
(see the check of LRO_TCP in __lro_proc_skb(), net/ipv4/inet_lro.c).

My question is: why can't the LRO mechanism be applied to UDP ? Or can
it be applied, but is not implemented yet or does not worth to be applied ?

Rgs,
Mark
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