[PLUG] Asynchronous Notification

Manas Alekar maalekar at gmail.com
Tue Mar 10 10:02:31 PDT 2009


>
> >  For that I used fasync method. kill_fasync() called in interrupt handler
> of
> >  gpio.
>


> If the IRQ handler is getting called correctly, then check whether the
> userspace handler has a policy of dropping pending signals when the
> handler is getting executed. Can you print out logs at the point when
> a signal is added to the pending queue of the process?
>

kill_fasync posts SIGIO. SIGIO is delivered only when appended to empty
queues
if I remember correctly.

- Manas


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