netdev - Re: GRO: forwading ISATAP packets is very slow with kernel 4.1

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Message-ID: <20150715095019.GA881@gondor.apana.org.au>
Date:	Wed, 15 Jul 2015 17:50:20 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Wolfgang Walter <linux@...m.de>
Cc:	netdev@...r.kernel.org
Subject: Re: GRO: forwading ISATAP packets is very slow with kernel 4.1

On Wed, Jul 15, 2015 at 02:34:41AM +0200, Wolfgang Walter wrote:
> 
> I wonder if the router may treat all ipv6-tcp connections of a host as a 
> single flow as all those ipv6-packets are embedded in ipv4-packets with the 
> ipv4-address of the host and the ipv4-address of the isatap-gateway and next-
> header is 41. It may only looks at those?

I think GRO is actually working fine.  Can you show me the output
of ethtool -k eth1? If hardware TSO is enabled can you try disabling
it to see if it helps?

Thanks,
-- 
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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