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Date: Mon, 24 Dec 2001 21:34:52 +0000
From: Thorsten Kranzkowski <dl8bcu@dl8bcu.de>
To: jbglaw@lug-owl.de
Cc: linux-kernel@vger.kernel.org
Subject: Re: Data sitting and remaining in Send-Q
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In-Reply-To: <1062462662.1009226676@[195.224.237.69]>; from linux-kernel@alex.org.uk on Mon, Dec 24, 2001 at 08:44:37PM -0000
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On Mon, Dec 24, 2001 at 08:44:37PM -0000, Alex Bligh - linux-kernel wrote:
> > That would give a different result: "functional TCP connections" or
> > "non-functional TCP connections". Mine are between that. If data gets
> > sent in small chunks, everything is fine, but if it's a larger
> > transfer (more than one ethernet frame may transport???), write()
> > stalls (or non-blocking write returns), but data is kept in
> > Send-Q rather than being sent down to the client.
> 
> Just to check the completely obvious:
> 
[...]
> 
> If you have an L3 device (router etc.) in the middle, you can get
> a similar effect if the device does not fragment data correctly
> (for instance the Cisco into ip tunnels bug - now fixed I think),
> or, if you are using PMTU discovery (probably), if some evil device,

Jan,
do you have some DSL Modem in between?

Thorsten

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| Thorsten Kranzkowski        Internet: dl8bcu@dl8bcu.de                      |
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