Subject: Re: [PATCH] igmp: spin_lock_bh in timer (Re: BUG: soft lockup detected on CPU#0!)

From: Jarek Poplawski <[email-masked]>
Date: Thu, 28 Dec 2006 13:56:26 +0100

On Wed, Dec 27, 2006 at 08:16:10AM -0800, Ben Greear wrote:
...
> The system hangs and does not recover (well, a few processes
> continue on the other processor for a few minutes before they
> too deadlock...)
> 
> I am guessing this problem has been around for a while, but it
> is only triggered when interfaces are created, and probably only
> when UDP traffic is already running heavily on the system.  Most
> systems w/out virtual devices will not trigger this sort of
> race.

Considering your contribution into kernel,
many people here would like to help, I hope,
but these informations are probably not enough.

Maybe some more logs & dmesg? If it deadlocks
anyway, maybe adding panic() after dump_stack()
could tell something.

Jarek P.