From: Wolfgang Walter <linux@stwm.de>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: netdev@vger.kernel.org
Subject: Re: GRO: forwading ISATAP packets is very slow with kernel 4.1
Date: Wed, 15 Jul 2015 14:25:59 +0200 [thread overview]
Message-ID: <2477915.Hv2mXUtnDZ@stwm.de> (raw)
In-Reply-To: <20150715095019.GA881@gondor.apana.org.au>
Am Mittwoch, 15. Juli 2015, 17:50:20 schrieb Herbert Xu:
> 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,
Yes. Switching TSO off and leaving GRO on works, too.
Thanks,
--
Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts
next prev parent reply other threads:[~2015-07-15 12:26 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-14 22:16 GRO: forwading ISATAP packets is very slow with kernel 4.1 Wolfgang Walter
2015-07-15 0:08 ` Herbert Xu
2015-07-15 0:34 ` Wolfgang Walter
2015-07-15 9:50 ` Herbert Xu
2015-07-15 12:25 ` Wolfgang Walter [this message]
2015-07-16 0:23 ` sit: Set SKB_GSO_SIT bit when performing GRO Herbert Xu
2015-07-16 10:58 ` Wolfgang Walter
2015-07-17 1:56 ` Herbert Xu
2015-07-17 15:38 ` Wolfgang Walter
2015-07-20 6:14 ` Herbert Xu
2015-07-20 9:39 ` Wolfgang Walter
2015-07-20 9:55 ` Revert "sit: Add gro callbacks to sit_offload" Herbert Xu
2015-07-20 23:53 ` David Miller
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