Re: [Xenomai-help] Maximum number of kernel tasks?

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Jefferson Noxon wrote:
> Hello,
> 
> This is my first project using Xenomai. I have a Diamond Systems Athena II
> board with an 800 MHz VIA Mark (Corefusion) chip. I built Xenomai 2.4.5 with
> Linux kernel 2.6.26.5 and I-pipe 2.0-09.
> 
> For some reason I can create 7 kernel tasks just fine, but the 8th task
> fails with -ENOMEM in rt_task_create(). I increased the heap size from 128Kb
> to 256Kb, but the problem persists. If I remove my kernel module and re-load
> it after a task creation fails, I get an oops in __xntimer_init after
> starting my first task (which is periodic).

This should be fix in xenomai 2.4.6.

> 
> If I build the same code to run in user-space (I have ifdefs allowing me to
> build it either way), I can create as many tasks as I want and my code
> behaves exactly as I would expect it to.
> 
> I imagine I am probably doing something stupid, but since it works in user
> mode I'm not sure what to check. Is there a limit of RT kernel tasks? If
> not, any pointers on how to debug this would be appreciated.

Did you try to change the stack pool setting in kernel configuration?

-- 
					    Gilles.