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

Lee Revell rlrevell at joe-job.com
Tue Jun 27 19:30:20 UTC 2006


On Tue, 2006-06-27 at 21:20 +0200, Pieter Palmers wrote:
> Lee Revell wrote:
> > On Mon, 2006-06-26 at 22:35 +0200, Pieter Palmers wrote:
> >> Another strange thing is: why doesn't the tasklet finish, so that it
> >> can be 'unscheduled'? I have my IRQ priorities higher than any other
> >> RT threads, so I would expect that the tasklet can finish. Or is 
> >> tasklet_kill not-preemtible? that would be very strange as I would 
> >> expect that busy waiting on something in a non-preemptible code path
> >> on a single-cpu system always deadlocks. 
> > 
> > When are you going to report this to Ingo + LKML + the other -rt
> > developers?
> > 
> After I do the printk testing to pinpoint the problem a little more 
> precise (as you suggested yesterday).
> 
> However, I didn't feel like iterating through the recompile 
> kernel/crash/reboot cycle even more yesterday.
> 
> Is there any underlying reason for this question?

Only that you seem to have found a bug in -rt and I'd like to get it
fixed.

Lee




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