linux-kernel - Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+

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Message-ID: <20080526181216.GA12400@elte.hu>
Date:	Mon, 26 May 2008 20:12:16 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+


* Ilpo Järvinen <ilpo.jarvinen@...sinki.fi> wrote:

> > Active Internet connections (w/o servers)
> > Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
> > tcp        0 207232 europe:37198                europe:distcc               ESTABLISHED 19578/distcc        
> > tcp        0      0 europe:ssh                  dione:36284                 ESTABLISHED -                   
> > tcp        0      0 europe:ssh                  e2:45910                    ESTABLISHED -                   
> > tcp    72283      0 europe:distcc               europe:37198                ESTABLISHED -                   
> 
> Just to be sure (please forgive me if you find this nearly an insult 
> :-)), did you have enough rights to find out the pid (ie., if that 
> process not owned by you then you need superuser privs for that)?

yes, i ran netstat -p as root.

> > the socket does not seem to be owned. It should have closed down? 
> > Refcounting issue?
> 
> It's well possible that e.g., net namespaces have some bug in handling 
> of orphaned tcp.

yes, that would match the symptoms i think. I half-assumed that it's a 
state machine problem so i didnt even check what the reader does - and 
in this case it appears to not exist at all anymore ;-)

	Ingo
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