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Date: Sun, 12 Dec 2010 15:29:48 -0800
From: Stephen Hemminger <shemminger@...tta.com>
To: Shmulik Hen <shmulik.hen@...il.com>
Cc: netdev@...r.kernel.org
Subject: Re: System blocks (hangs) on ifconfig up
On Sun, 12 Dec 2010 17:00:26 +0200
Shmulik Hen <shmulik.hen@...il.com> wrote:
> Hello,
>
> My system is Ubuntu 10.04, running kernel 2.6.32-26-generic.
>
> Whenever I try to bring up a specific ethernet interface for the second
> time, my
> system becomes unresponsive for 60 seconds - i.e. no mouse, no keyboard, no
> screen refresh. etc.
>
> Looking at the driver's code, I could see that it's dev->open() method calls
> wait_event_interruptible_timeout() with a timeout of 60 seconds - exactly
> the delay I'm seeing.
>
> I have narrowed the code to a bare minimum (see below - loosely based on
> dummy.c), which only calls mdelay(10000) in it's dev->open() method, and
> still, my system blocks for exactly 10 seconds when I run the following
> sequence:
>
> > sudo ifconfig shmulik0 up
> > sudo ifconfig shmulik0 down
> > sudo ifconfig shmulik0 up
>
> At this point - the system is stuck for 10 seconds.
>
>
> Thanks,
> Shmulik.
What driver is this? Where is the source? It sounds awful
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