netdev - Re: Networking hangs when too many parallel requests are made at once

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Date:	Tue, 9 Nov 2010 16:17:28 -0500
From:	Luke Hutchison <luke.hutch@...il.com>
To:	Ben Greear <greearb@...delatech.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Networking hangs when too many parallel requests are made at once

On Tue, Nov 9, 2010 at 3:35 PM, Ben Greear <greearb@...delatech.com> wrote:
> On 11/09/2010 12:27 PM, Luke Hutchison wrote:
>> No, I haven't been able to reproduce on any other machine.  But it
>> happens on both my wifi NIC and my ethernet NIC in this machine.
>
> Well, let us know what those are, at least.

>From my first email:

> I have a Toshiba Satellite Pro S300M-S2142
> laptop with a Core 2 Duo P8600 CPU, Intel GM45 gfx,
> Intel 82567V Gigabit Ethernet and Intel 5100 Wifi,
> running kernel kernel-2.6.36-1.1.fc15.x86_64 on top
> of Fedora 14.

On Tue, Nov 9, 2010 at 3:35 PM, Ben Greear <greearb@...delatech.com> wrote:
> And, a network capture of your system going into this state might
> be useful.  I'd try to disable your wireless NIC entirely and focus
> on debugging the wired NIC as that is usually easier to debug.

Sure -- a wireshark trace is here: http://web.mit.edu/~luke_h/www/trace.bz2

In this particular trace, I opened about 20 browser tabs at once.
They all locked up after about 5 seconds.  A few of them loaded some
more content after a minute or two.  A minute or two later, I killed
them all.  In this particular example, pinging to a specific domain
name continued to work (it doesn't always), although I couldn't get
content from the domains in question: e.g. I could ping google.com,
but opening a new tab and trying to visit google.com caused the new
tab to hang too.

Thanks,
Luke
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