waiting for ppp0 to become free (Re: ppp0 out of control)

From: Janos Farkas (jf-ml-k1-1087813225_at_lk8rp.mail.xeon.eu.org)
Date: 01/26/05

  • Next message: Con Kolivas: "[PATCH] sched - Implement priority and fifo support for SCHED_ISO" 
    Date:	Wed, 26 Jan 2005 10:44:22 +0100
To: linux-kernel@vger.kernel.org

    On 2005-01-21 at 15:44:44, Aurélien GÉRÔME wrote:
    > I am running 2.6.10 from kernel.org on Debian Sid ppc/x86, the same
    > issue occurs with 2.6.9. Though, 2.6.8.1 and previous are fine.
    >
    > When my ISP connection via PPPoE (kernel side) goes down, reconnection
    > does not occur, and the kernel displays continuous:
    >
    > kernel: unregister_netdevice: waiting for ppp0 to become free. Usage count = 1

    BTW, I have seen many cases when this symptom annoyed me too, the last
    one is that my shutdown scripts tried unloading the network driver
    modules. Is your setup doing this by any chance? In my case,
    apparently there were conntrack entries keeping the device in use,
    which is almost useless when preparing to shutdown :)

    OTOH, I couldn't find a way to flush those conntracks, so I worked
    around it by not rmmoding ethernet drivers.

    In your case, it's probably conntrack too, I'd presume you are using
    that PPPoE machine as a masquerading gateway, which by definition needs
    connection tracking... I'm not sure either if this is a "real" change,
    I only vaguely recollect as some moons earlier this wasn't a problem in
    2.6. 

    -- 
Janos | romfs is at http://romfs.sourceforge.net/ | Don't talk about silence.
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  • Next message: Con Kolivas: "[PATCH] sched - Implement priority and fifo support for SCHED_ISO"

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