Hi. I'm preparing to use the NMI watchdog feature to do some
debugging. To get ready, I've created a module like this:
/* ... */
int deadlock_init(void)
{
local_irq_disable();
while ("I want to loop!")
;
return 0;
}
module_init(deadlock_init);
/* ... */
I boot with these parameters:
lapic nmi_watchdog=2 console=ttyS0,9600n8 console=tty0
I see nmi.c:check_nmi_watchdog is satisfied:
testing NMI watchdog ... OK.
... and I can see the nmi count in /proc/interrupts increasing every
couple minutes or so. I have a serial console going to another
computer. When I load this module, though, I don't ever see any
debugging information on the screen or on the serial console.
Is there anything else I need to do? I'm assuming that I should see
an NMI-watchdog-generated oops because of the infinite loop with
interrupts disabled.
--
Ed L Cashin <ecashin@xxxxxxxxxx>
--
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