netdev - Re: [Bugme-new] [Bug 11316] New: severe performance regression for iptables nat routing

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Message-Id: <E1KTrAo-0001YG-00@gondolin.me.apana.org.au>
Date:	Fri, 15 Aug 2008 14:44:26 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	alex.williamson@...com (Alex Williamson)
Cc:	kaber@...sh.net, davem@...emloft.net, akpm@...ux-foundation.org,
	buytenh@...vell.com, netdev@...r.kernel.org,
	bugme-daemon@...zilla.kernel.org
Subject: Re: [Bugme-new] [Bug 11316] New: severe performance regression for	iptables nat routing

Alex Williamson <alex.williamson@...com> wrote:
> 
> Attached, let me know if you want more options, this is just -vv -n.
> The NAT'ing system is at 10.0.2.15 and the ssh tunnel target is
> 192.168.1.60.  Thanks,

Right, the underlying TCP connection is going well, but the NATed
connection is getting checksum errors.  Please send us the raw
packet dump on lo (tcpdump -s 1600 -w file) so we can see what's
wrong.

Actually, I think know what's going on but a raw packet dump should
confirm whether we're getting a partial checksum.

Thanks,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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