netdev - Re: GSO and IPv4 forwarding

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Message-ID: <1288125808.2652.46.camel@edumazet-laptop>
Date:	Tue, 26 Oct 2010 22:43:28 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Kevin Wilson <wkevils@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: GSO and IPv4 forwarding

Le mardi 26 octobre 2010 à 22:26 +0200, Kevin Wilson a écrit :
> Hi,
> Thanks a lot for your quick answer, I appreciate it (and did not
> expect it to be so quick!)
> 
> Can someone please explain in 2-3 short sentences Why GRO can be
> forwarded and LRO cannot be forwarded ?

Well, GRO is a pure software thing, completely handled in linux stack,
not driver specific. Its design included forwarding ability, LRO did
not.

http://lwn.net/Articles/311357/



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