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

Pieter Palmers pieterp at joow.be
Tue Jun 27 15:20:31 EDT 2006


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?

Pieter


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