The author holds that lock-up is caused by endless loops,most of which relate to interrupts,and that RACKO-TACKO daisy-chain and incorrect returned address are two major roots of the lock-up problems, By analysing several lock-up examples.

• 作者认为,死机是由死循环造成的,且绝大多数死循环都与中断有关,而RACKO-TACKO菊花链及错误的返回地址则是引起死机的主要原因。