netdev - Re: net-2.6.22 UDP stalls/hangs

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Message-Id: <20070423132719.b7cf1c9e.akpm@linux-foundation.org>
Date:	Mon, 23 Apr 2007 13:27:19 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: net-2.6.22 UDP stalls/hangs

On Mon, 23 Apr 2007 13:18:10 -0700 (PDT)
David Miller <davem@...emloft.net> wrote:

> From: Andrew Morton <akpm@...ux-foundation.org>
> Date: Mon, 23 Apr 2007 13:07:34 -0700
> 
> > The interesting bit is:
>  ...
> > I think I saw the same problem maybe 1.5 weeks ago on this machine, but I
> > didn't have time to investigate further.  So it's not some recent thing.
> 
> My initial reaction is that DNS responses are being lost or dropped
> for some reason.

Plausible.   I'll try booting it with the ethernet unplugged.

> Please run tcpdump on the network while this machine comes up and
> see if DNS requests and replies are going back and forth
> correctly.

hm.  That would require a hub and rather a lot of head-scratching.

> Also, please indicate what kind of network card is in this computer.

e1000:

05:00.0 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper) (rev 01)

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