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From: David Miller <davem@davemloft.net>
Subject: Re: tcp_shift_skb_data uses wrong mss in non-gso case?
Date: Wed, 25 Aug 2010 16:43:31 -0700 (PDT)
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From: Robert Evans <robert.evans@nasdaqomx.com>
Date: Wed, 25 Aug 2010 10:43:23 -0400

> However, that code was added after Ilpo's SACK patches. The original patch 
> went in for 2.6.29, and Ilpo fixed the retransmit in 2.6.30.  So 2.6.29 and 
> its descendants can have this problem. I'm using 2.6.29.4, so there you 
> have it.
> 
> A kernel update will definitely fix my problem, so that should be the 
> end of it.  Thanks for your time everyone!

Thanks for hunting down the true cause of the problem.

If 2.6.29.x-stable was still active we should submit a backport but
to the best of my knowledge that branch -stable is no longer active.