Watchdog interrupt

[Manuel]

Hi all,

 

Have a question regarding the watchdog interrupt. I think that typically,
the watchdog interrupt should be a non-maskable interrupt, so that the
interrupts should be serviced regularly and not be dependent on the
interrupt latency. 

 

If the watchdog interrupt is maskable and if a problem occurs and the
interrupts are left disabled for a long period of time, the watchdog
interrupt will never be triggered and the system might not have a chance to
detect that.

 

The other solution would be never to disable the watchdog interrupt.

 

Of course, if the watchdog interrupt is non-maskable or if it never
disabled, then it must not call any RTEMS directive.

 

What is your opinion about this subject.

 

Kind regards

Manuel Coutinho

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