On Wed, Dec 17, 2014 at 12:24:23PM +0000, Stoidner, Christoph wrote:
>
> After some research I have ended up now in APC'c thread handling
> (see code snipped below, out of ksrc/arch/generic/hal.c). From my
> point of view there could be occur the "lost wakeup problem". That
> means in detail that rthal_kicker() calls wakeup when
> rthal_apc_thread() has returned from rthal_apc_handler() but not
> yet called set_current_state(). After that, when kicker has
> finished, the APC thread calls set_current_state() and goes to
> sleep. Thus, the wakeup is lost. Or do I overlook something? Maybe
> we should use a waitqueue here?
Indeed, this looks suspicious. Please try the wait queue.
--
Gilles.
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