linux-kernel - Re: sometimes very long response times on network interfaces since 2.6.22

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Date:	Wed, 10 Oct 2007 09:00:40 +0200
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Ingo Freund <linux-kernel-news@...ict.net>
CC:	linux-kernel@...r.kernel.org
Subject: Re: sometimes very long response times on network interfaces since
 2.6.22

Ingo Freund a écrit :
> Hello,
> 
> since I switched to kernel 2.6.22 my dell 1750 server
> with the two onboard BCM5704 network interfaces doesn't
> work properly anymore.
> TCP requests sometimes need more than 30 seconds to be answered
> (or to get away) and the application stops with timeouts.
> We are talking about two servers connected via Gigabit switch.
> The timeouts happen up to ten times a day.
> In the meantime I tried an old 3com 3c905c NIC which showed
> the same behaviour.
> I still couldn't figure out in which special situation the
> communication stops.
> The only solution ist to boot the old 2.6.21.5 kernel.
> With this, all runs fine.
> Did I miss a config issue in the migration to 2.6.22?
> The machines run in a productive environment and there is
> not much room (time) to debug, but if needed, I could try
> if anyone would need more information for help.
> 

Hi
1) A tcpdump would help for sure...
2) Could you try 2.6.23
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