On Thu, 22 Dec 2011, Uwe Kleine-König wrote: > On Wed, Dec 21, 2011 at 11:48:36AM +0100, Lukas Erlinghagen wrote: > > ------------[ cut here ]------------ > > kernel BUG at kernel/rtmutex.c:724! > That's a recursive spinlock. Try enabling CONFIG_PROVE_LOCKING. News at eleven. I already explained Lukas, _why_ this happens. So what the heck will CONFIG_PROVE_LOCKING provide as extra value? We all appreciate your helpfulness, but your signal to noise ratio is approaching zero. Thanks, tglx