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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2477915.Hv2mXUtnDZ@stwm.de>
Date:	Wed, 15 Jul 2015 14:25:59 +0200
From:	Wolfgang Walter <linux@...m.de>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	netdev@...r.kernel.org
Subject: Re: GRO: forwading ISATAP packets is very slow with kernel 4.1

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
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html