[Xenomai] Some Information About compilation Xenomai and RT Patches

Gilles Chanteperdrix gilles.chanteperdrix at xenomai.org
Tue Jun 24 08:37:18 CEST 2014

On 06/24/2014 01:41 AM, Gilles Chanteperdrix wrote:
> On 06/23/2014 12:04 PM, Stoidner, Christoph wrote:
>> Original ipipe-3.10.18 without Preempt-RT works without any problem.
>> The problem occurs only in combination of my Preempt-RT merge and
>> enabled FCSE in guaranteed mode.
>> Since unmodified ipipe-3.10 does not show the problem I assume
>> unmodified ipipe-3.14 also does not show the problem. Or do you think
>> 3.14 brings some more details?
> I definitely fixed some FCSE issues in the ipipe-3.14 branch, mostly
> when FCSE is enabled without CONFIG_IPIPE. Now if ipipe-3.10.18 has no
> issues, whereas mixing Prempt-rt in makes some issues appear, I would
> suggest looking carefully at the changes introduced by the preempt-rt
> patch with regard to mm handling.
Something else, if what you had trouble with is the spinlock merge, you
should maybe double check that ipipe_spinlocks work as expected, because
the FCSE code uses an ipipe_spinlock, and if this spinlock ends up as a
sleeping spinlock, things could get messy.


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