On 5/24/07, Paul Mundt <[email protected]> wrote:
So far the only example anyone has provided outside of periodic timers or
hardware reset has been dumping the stack when something gets stuck.
Softlockup does this already today, using a timer.
Many watchdogs can be hooked up to a non-maskable interrupt (NMI) that
cannot be disabled or preempted. You get a stack dump even for drastic
bugs: ISR lock up, timer misconfiguration, level-sensitive interrupt
line stuck asserted, and so forth. Getting that information by other
means can be painful and/or expensive.
The Blackfin chip in the original message appears to support watchdog
NMI.
-- Daniel
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