[linux-audio-dev] ieee1394 deadlock on RT kernels

[Lee Revell]

On Mon, 2006-06-26 at 21:05 +0200, Pieter Palmers wrote:
> Lee Revell wrote:
> > On Mon, 2006-06-26 at 16:51 +0200, Pieter Palmers wrote:
> >>  
> >> Of course. My monday-morning bad temper is over by now, and I hope I 
> >> didn't transfer it to any of you. I'll provide the panic, one way or 
> >> another.
> >>
> > 
> > Can you reproduce the problem on a non-RT kernel?
> > 
> 
> No, it only occurs with RT kernels, and only with those configured for 
> PREEMPT_RT. If I use PREEMPT_DESKTOP, there is no problem. (with 
> threaded IRQ's etc... only switched over the preemption level in the 
> kernel config).
> 
> I've uploaded the photo's of the panic here:
> http://freebob.sourceforge.net/old/img_3378.jpg (without flash)
> http://freebob.sourceforge.net/old/img_3377.jpg (with flash)
> 
> both are of suboptimal quality unfortunately, but all info is readable 
> on one or the other.

Can you add debug printk's before and after tasklet_kill() in
ohci1394_unregister_iso_tasklet to see where it locks up?

Lee