netdev - 2.6.23-rc[68]-mm: network hangs

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Date:	Fri, 28 Sep 2007 21:48:18 +0200
From:	Laurent Riffard <laurent.riffard@...e.fr>
To:	Kernel development list <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org
Subject: 2.6.23-rc[68]-mm: network hangs

Hi,

>From time to time, I experience some complete network hangs:

Suddenly, all network connections become unresponsive. Even "ping
127.0.0.1" doesn't work. SysRq-w does not show any blocked processus.

When such hang happen, I have to reboot (shutdown does work).

This is not easily reproducible: it happens several minutes after 
boot (could be 45 minutes or 2 hours). I do not use heavy networking 
apps (like P2P). My typical usage is a Gnome desktop with  browser, 
mailer, IM, video or audio streaming. 

I have a single PC connected to a DSL router via ethernet (so no LAN 
with NFS or CIFS).

This happens with 2.6.23-rc8-mm2 and 2.6.23-rc6-mm1. I can't remember 
when I first see this problem. Maybe 2 months ago.

I attached the output of "strace ping 127.0.0.1". How can I collect 
some more data when this problem happens ?

~~
laurent

View attachment "ping.strace" of type "text/plain" (7460 bytes)