linux-kernel - Re: Networking messed up, bad checksum, incorrect length

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Message-Id: <E1GdJNf-0002xT-00@gondolin.me.apana.org.au>
Date:	Fri, 27 Oct 2006 14:31:43 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	lkml@...ipnet.com (Carlos Velasco)
Cc:	herbert@...dor.apana.org.au, linux-kernel@...r.kernel.org,
	linux-net@...r.kernel.org
Subject: Re: Networking messed up, bad checksum, incorrect length

Carlos Velasco <lkml@...ipnet.com> wrote:
> 
>> netfilter will see the jumbo frames rather than the individual packets.
> 
> I wonder if this could affect the TCP stateful tracking of netfilter
> making the ACK drops I see.

It shouldn't if netfilter is behaving correctly.  The whole point of
TSO is that the packet is an otherwise valid TCP/IP packet.  The only
thing special about it is that it exceeds the MTU of the output device.

That's what allows us to implement TSO without touching all parts of
the networking stack.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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