Re: machine can not reboot itself while ed1 is present (sources of 19th feb 2004)

[Dave Cuthbert <dacut@xxxxxxxxxxxxx>]

Matthew Dillon wrote:
>     It sounds like an interrupt is not getting deasserted and the system
>     is livelocking until the card gets pulled out and stops deasserting
>     the interrupt.  My guess.

Hm.  It would be useful, from a debugging/development standpoint, if the 
kernel could heuristically detect this.

I'm thinking of something like:

interrupt_loop_counter = 0;

while (interrupt_asserted()) {
    if (++loop_counter > MAX_INTERRUPT_CYCLES) {
        disable_interrupt();
        print_a_message_about_this();
        enter_debugger();
        reenable_interrupt();
    }

    handle_interrupts();
}