netdev - Re: Fw: [Bug 79891] New: Router causes TCP retransmits for windows hosts after "ip_forward: fix inverted local

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Date:	Fri, 11 Jul 2014 19:11:50 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Cong Wang <cwang@...pensource.com>
Cc:	Stephen Hemminger <stephen@...workplumber.org>,
	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	stable <stable@...r.kernel.org>
Subject: Re: Fw: [Bug 79891] New: Router causes TCP retransmits for windows
 hosts after "ip_forward: fix inverted local_df test"

On Thu, 2014-07-10 at 10:11 -0700, Cong Wang wrote:
> On Thu, Jul 10, 2014 at 6:44 AM, Stephen Hemminger
> <stephen@...workplumber.org> wrote:
> >
> > After upgrading a router to Linux 3.2.60 most windows machines behind it
> > started experiencing connection stalls. Downgrade to 3.2.59 resolved the
> > problem. Using git bisect I pinpointed it to
> > "59d9f389df3cdf72833d5ee17c3fe959b6bdc792 is the first bad commit", which
> > entered the kernel from here
> > http://marc.info/?l=linux-netdev&m=139949081418806&w=2
> >
> 
> This commit should have been reverted for older kernels like 3.2.y.

Really?  We already had fe6cc55f3a9 ("net: ip, ipv6: handle gso skbs in
forwarding path") backported in 3.2.57.

Ben.

-- 
Ben Hutchings
To err is human; to really foul things up requires a computer.

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