重启后，jiffies没有初始化为零，而是初始化为某个高值(接近环绕)。例如(重启后立即):cat/proc/timer_list|grepjiffies.idle_jiffies:4294902561.last_jiffies:4294902561.next_jiffies:4294902623jiffies:4294902561.idle_jiffies:4294902561.last_jiffies:4294902561.next_jiffies:4294902568jiffies:4294902561.idle_jiffies:4294902561.last_jiffies:4
