问一个中断顶半部与底半部问题

fuchuangbob

NOTE: ***** WARNING *****
NEVER SLEEP IN A COMPLETION HANDLER. These are normally called
during hardware interrupt processing. If you can, defer substantial
work to a tasklet (bottom half) to keep system latencies low. You'll
probably need to use spinlocks to protect data structures you manipulate
in completion handlers.
根据以上NOTE，在urb回调函数中，将urb挂到一个队列中，tasklet_handler遍历此队列处理数据，处理数据的过程中处理资源又用到自旋锁

结果是双核系统出soft lockup OOPS，单核系统挂起

请指教