Re: [Xenomai-help] spurious interrupt with latest release

["stephane ancelot" <sancelot@domain.hid>]

Le Thu, 04 Sep 2008 11:05:05 +0200, Gilles Chanteperdrix  
<gilles.chanteperdrix@xenomai.org> a écrit:

> stephane ancelot wrote:
>> Hi,
>> Finally since I did not understand why this happened and to inhibit any
>> driver writing related problems,I made the following architecture :
>>
>> a single 5ms task triggs a PLX 9050 INTCSR software register to activate
>> INTA  (level irq)
>>
>> the rtdm interupt handler checks if IT comes from the PLX, disable PLX  
>> IT,
>> resets the software register , reenable PLX it,
>> and ack irq rtdm
>>
>> However at random time , I have always spurious interrupt in this  
>> handler.
>> The time it occurs is random .
>>
>> attached my kernel config.gz
>
> Hi,
>
> Did you check the differences in masking/acking/unmasking interrupts for
> the interrupt controller you use between the I-pipe patch that works and
> the I-pipe patch that does not work ?
>

I know that it rocks with
kernel 2.6.24.2 and  adeos-ipipe-2.6.24-x86-2.0-03.patch

it does not with :
kernel 2.6.26.2 and adeos-ipipe-2.6.26-x86-2.0-09.patch

Having a look at the patch I did not manage to find big differencies only  
in entry_32.S sysenter for enabling hw it, but I am not sure if this part  
of code may be related to my problem

The routed IRQ number is 18d

enabling ipipe and kernel debugging options does not help.


It would be useful , if I could reproduce the problem using a standard  
component of the PC to trig an IT like the PLX soft register, in order  
produce a regression test and some people being able to reproduce  
it.Supposing the same problem should appear :-)



Best Regards
Steph


> Regards.
>