Bug#423248: linux-image-2.6.18-4-486: [r8169] drops received TCP packets when using jumbo frames

[Moritz Muehlenhoff <jmm@inutil.org>]

On Thu, May 10, 2007 at 10:37:01PM +0200, Josselin Mouette wrote:
> Package: linux-2.6
> Version: 2.6.18.dfsg.1-12, 2.6.18.dfsg.1-12etch1
> 
> When upgrading to the etch version of the kernel, I noticed a complete 
> NFS lockup as soon as a client tries to write something.
> 
> I tracked this down to the TCP layer; I'm using jumbo frames (tried with 
> MTU ranging from 2000 to 7200) and all *received* TCP packets exceeding 
> 1500 bytes are simply dropped. They don't even appear in tcpdump. This 
> does not affect UDP nor ICMP packets, and this does not affect sent TCP 
> packets.
> 
> It is a regression from 2.6.18.dfsg.1-8, and I think it is related to 
> the r8169 changes introduced in -9, as the network controller is a 
> D-Link DGE-528T using this driver.

Does this error still occur with more recent kernel versions?

If that machine still runs Etch, could you try to reproduce this bug
with the 2.6.24 based kernel added in 4.0r4?

Cheers,
        Moritz