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

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Message-ID: <20080602140855.GA25944@gondor.apana.org.au>
Date:	Tue, 3 Jun 2008 00:08:55 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>
Cc:	johnpol@....mipt.ru, ray-lk@...rabbit.org, mingo@...e.hu,
	LKML <linux-kernel@...r.kernel.org>,
	Netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>, rjw@...k.pl,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [bug] stuck localhost TCP connections, v2.6.26-rc3+

On Mon, Jun 02, 2008 at 02:53:09PM +0300, Ilpo Järvinen wrote:
>
> Shouldn't that be already visible in the ingo's sysrq-t dump, no? There:
> 
>   http://marc.info/?l=linux-kernel&m=121182099131520&w=2

No, we need an actual strace rather than the static stack back-trace.
So start with netstat -lntp to locate the process listening on that
port, and then strace it to see if it's calling accept.

> There are many sys_accepts at least (if I understand that dump at all). 
> There were some ip_local_outs there as well, which made me wonder if the 
> totally innocent looking commit 1ac06e0306d0192a7a4d9ea1c9e06d355ce7e7d3 
> (ipsec: Use the correct ip_local_out function) has something to do with 
> this (I definately don't understand that part at all).

This patch only has an effect for IPsec.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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