netdev - Re: [PATCH 2/8] net: Add frag

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Message-Id: <20081215.233059.01751593.davem@davemloft.net>
Date:	Mon, 15 Dec 2008 23:30:59 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	netdev@...r.kernel.org, johnpol@....mipt.ru,
	bhutchings@...arflare.com
Subject: Re: [PATCH 2/8] net: Add frag_list support to GSO

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Sat, 13 Dec 2008 12:35:20 +1100

> net: Add frag_list support to GSO
> 
> This patch allows GSO to handle frag_list in a limited way for the
> purposes of allowing packets merged by GRO to be refragmented on
> output.
> 
> Most hardware won't (and aren't expected to) support handling GRO
> frag_list packets directly.  Therefore we will perform GSO in
> software for those cases.
> 
> However, for drivers that can support it (such as virtual NICs) we
> may not have to segment the packets at all.
> 
> Whether the added overhead of GRO/GSO is worthwhile for bridges
> and routers when weighed against the benefit of potentially
> increasing the MTU within the host is still an open question.
> However, for the case of host nodes this is undoubtedly a win.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied.
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