求解答：为何NMI中断里加打印，系统莫名其妙会重启 ？
查看printk注释，其可以在任何上下文调用：/*
* This is printk.It can be called from any context.We want it to work. *
* We try to grab the console_sem.If we succeed, it's easy - we log the output and
* call the console drivers.If we fail to get the semaphore we place the output
* into the log buffer and return.The current holder of the console_sem will
* notice the new output in release_console_sem() and will send it to the
* consoles before releasing the semaphore.
*
* One effect of this deferred printing is that code which calls printk() and
* then changes console_loglevel may break. This is because console_loglevel
* is inspected when the actual printing occurs.
*/
那为何系统又会重启呢？
偶研究了NMI中断机制，查看了整个流程，百思不得其解
您知道么？ 这句话有错误吧，printk是会引起调度的 “printk是会引起调度的”
不同意这句，应该不会引起调度的。
LZ看看代码吧，也许是其他地方的问题。 NMI时间过长 导致看门狗硬件启动系统？ NMI时间过长 导致看门狗硬件启动系统？
smalloc 发表于 2011-04-05 16:15 http://bbs.chinaunix.net/images/common/back.gif
这个解释倒似乎说的过去
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