Re: [Xenomai-core] ipipe_suspend_domain() not scheduling IRQ threads

[Peter Schueller <peter.schueller@domain.hid>]

Philippe Gerum wrote:
>> I am currently trying to port IPIPE to a new architecture and have the following symptoms with my
>> first testcase:
>>
>> - I am using a 2.6.23 Kernel and mainly looked at blackfin and i386 when porting.
>> - I create a domain with priority IPIPE_ROOT_PRIO+100 in a kernel module
>> - The domain entry does only: for(;;) ipipe_suspend_domain();
>> - After registering the domain I get the message "I-pipe: Domain Module Testdomain registered." and
>> after that the system hangs.

I was finally able to fix the problem: I had overlooked the interrupt tailcall which has to look for 
processes to be scheduled and everything so far worked good without that - except IPIPE (I had 
implemented the tailcall for syscalls only).

>> - Should I read some documentation to get help? (I only found the porting guide and some other 
>> guides which did not help me answer the following questions)
> 
> I don't know of any other doc -- this one being rather outdated,
> unfortunately.
> 

The porting guide contains no information about what the behaviour of the test module should be. If 
the test module contains a domain doing

   for(;;) ipipe_suspend_domain();

does the "insmod test.ko" command have any chance of returning to the shell? After reading the 
ipipe_register_domain code I do not think so but perhaps I missed something.


Peter

-- 

Peter Schüller
Theobroma Systems Design und Consulting GmbH
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