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Subject: Re: Possible network issue in 2.6.8.1
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Joris Neujens <joris@discosmash.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: Tue, 07 Sep 2004 14:35:56 +0100
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On Maw, 2004-09-07 at 14:55, Joris Neujens wrote:
> We have ruled out the following:
> Network source is slow (we were testing with the same FTP server all the
> time, from which we normally download at 10MB/sec)
> We tested with 3 different systems and network cards, and they all have
> the same problem, and only with kernel 2.6.8
> 
> any thoughts?

See the list archive, or the lwn article on broken routers mangling TCP
window size negotiation. The lwn article has a nice discussion as well
as workarounds if you need them.