Re: [Adeos-main] CONFIG_PREEMPT doesn't work with ADEOS

[Philippe Gerum <rpm@xenomai.org>]

Jan Kiszka wrote:
> Philippe Gerum wrote:
> 
>>Philippe Gerum wrote:
>>
>>>Bernhard Walle wrote:
>>>
>>>
>>>>Hello,
>>>>
>>>>I have a kernel 2.6.15.6 with
>>>>http://download.gna.org/adeos/patches/v2.6/i386/adeos-ipipe-2.6.15-i386-1.2-03.patch
>>>>
>>>>patch. In this configuration, CONFIG_PREEMPT doesn't work any more,
>>>>i.e. the kernel is not preempted.
>>>>
>>>
>>>How do you check this?
>>>
>>
>>Forget about this question. I'm going to give a look at your testcase
>>when time allows. Thanks.
>>
> 
> 
> I did, and I can confirm this (2.6.16, original ipipe-1.2-03 applied,
> ipipe on vs. off). Maybe something related to the TASK_ATOMICSWITCH changes?
> 

Don't know yet, I'm rebuilding an instrumented kernel, but considering 
that we don't even have local echo of keystrokes, I'd rather think of 
IRQs lagging in the pipeline log. More news later.

> 
>>>>With the kernel without ADEOS patch, it works fine. A test program is
>>>>at http://www.bwalle.de/temp/kern-preempt.tar.bz2.
>>>>
>>>>Do you know what's wrong?
>>>>
>>>>
>>>>Regards,
>>>>  Bernhard
>>>
>>>
>>>
> 
> Jan
> 
> 
> 
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-- 

Philippe.