netdev - Re: 2.6.34: Problem with UDP traffic on lo + poll(?)

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Message-ID: <1283804955.2585.12.camel@edumazet-laptop>
Date:	Mon, 06 Sep 2010 22:29:15 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Krzysztof Olędzki <ole@....pl>
Cc:	netdev@...r.kernel.org
Subject: Re: 2.6.34: Problem with UDP traffic on lo + poll(?)

Le lundi 06 septembre 2010 à 21:55 +0200, Krzysztof Olędzki a écrit :

> Yes, conntrack is one of possibilities. However, this problem only 
> manifests on 2.6.34 and never on 2.6.31 where iptables and conntrack 
> configurations are identically. And of course, each time it is a 
> different port.
> 
> Please also note that this problem only exists when communication is 
> handled over a loopback interface - I'm not able to trigger this from a 
> remote host even if I run the test on two hosts (local & remote) 
> simultaneously.
> 

No particular error shown in "netstat -s" ?

port randomization on UDP changed in the past, and conntracking changed
a bit too ;)





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