Fabien MAHOT wrote:
> > On Thu, May 29, 2008 at 1:26 PM, Fabien MAHOT
> > <[EMAIL PROTECTED]> wrote:
> >> I succeed to reduce my test program.
> >> Now, I ve got two xenomai threads.
> >> threadDisplay (prio : 70) : locks a mutex (conflict_lock mutex) and
> >> passes
> >> between Xenomai and Linux domain. (call to sleep())
> >> threadTimeOut (prio : 80) : Starts one timeout of 5ms and tries to lock
> >> the mutex taken by threadDisplay. (Priority Inheritance)
> >>
> >> threadTimeOut waits the conflict_lock unlock of threadDisplay. With
> >> priority inheritance, threadTimeOut gives its priority to threadDisplay.
> >> But, threadTimeOut must also do the EndTimeOut() processing. When the
> >> timeout end signal arrives, if threadDisplay is into Linux Domain, the
> >> system crashes.
> >
> > Do you have the same crash if you use vanilla Linux timer services
> > (__real_timer_create, __real_timer_settime, etc...).
> >
> > --
> > Gilles
>
> Hello,
>
> I try with vanilla linux timer. If threadTimeOut sets up one or two
> timeouts, now, it's ok. But if it sets up more than two timeouts, the
> system crashes.
> I ve got the same error kernel traces as Posix timer use.
>
> (By the way, In which file vanilla timer services are written ?
> __real_timer_create ... are declared in time.h in xenomai files. I look
> for in linux and glibc sources but I don t find them.)
>
> I send you a test program in which severals timeouts can be created.
Ok. Got it now. The error you have is fixed in the v2.4.x branch. So,
here is a patch that you can apply to the v2.4.3 release.
--
Gilles.
Index: ksrc/nucleus/shadow.c
===================================================================
--- ksrc/nucleus/shadow.c (revision 3704)
+++ ksrc/nucleus/shadow.c (working copy)
@@ -276,9 +276,11 @@ static void rpi_update(xnthread_t *threa
xnlock_get_irqsave(&rpislot->lock, s);
- sched_removepq(&rpislot->threadq, &thread->xlink);
- rpi_none(thread);
- rpi_push(thread, cpu);
+ if (rpi_p(thread)) {
+ sched_removepq(&rpislot->threadq, &thread->xlink);
+ rpi_none(thread);
+ rpi_push(thread, cpu);
+ }
xnlock_put_irqrestore(&rpislot->lock, s);
}
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