Hi,
> It looks like they are already on:
>
> CONFIG_DEBUG_STACKOVERFLOW=y
> CONFIG_DEBUG_STACK_USAGE=y
You could try bumping the limit for the warning in
arch/powerpc/kernel/irq.c
if (unlikely(sp < (sizeof(struct thread_info) + 2048)))
Change it to 4096.
Unfortunately if the long call chain is in an interrupt disabled area
you will not get warned.
> The machine is frozen after the panic.
You can do it sometime before the hang to see if you are getting close
to overflowing the stack.
Anton
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