Messages in this thread | | | Subject | Re: tasklet_unlock_wait() causes soft lockup with -rt and ieee1394 audio | From | Daniel Walker <> | Date | Mon, 10 Jul 2006 07:41:23 -0700 |
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On Sun, 2006-07-09 at 13:17 +0200, Pieter Palmers wrote: > > > > I am just posting this for Pieter - all followups should be directed to > > him. (I don't even have the hardware to reproduce this) > > > > IIRC the problem could only be reproduced with PREEMPT_RT. Pieter, can > > you confirm? > > It can only be reproduced with PREEMPT_RT. And the test kernel is > configured with irq threading, I haven't tried it without irq threading.
It's another one of those situations when a userspace real time process gets stuck in a tight loop waiting for a bit to change. It's similar to the issue with bit spinlocks, or yield.
You should be able to reproduce it without PREEMPT_RT but SMP only .
Daniel
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