netdev - Re: GRO/GSO hiding PMTU?

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Message-ID: <20110211000721.GA25457@gondor.apana.org.au>
Date:	Fri, 11 Feb 2011 11:07:21 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: GRO/GSO hiding PMTU?

On Thu, Feb 10, 2011 at 03:07:59PM -0800, David Miller wrote:
>
> Nevermind, I turned off gso/tso on eth0 (outgoing interface) and it still
> happens.

Turning off GSO/TSO has no effect if it's GRO generating the packet
since it still has to be segmented regardless.

So I think this is the problem that you found and we need to fix it
by checking the gso_size parameter.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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