all of those are condition=0 cause waiting!!!!!!First, we can see the prototype in the kernel!!!__wait_event!!!!!!!!!!!!#define __wait_event(wq, condition)      /do {         / DEFINE_WAIT(__w

高端内存相关？ Pages//内核把物理页面当做内存管理的基本单元  The kernel represents every physical page on the system with a struct page structure. This structure is defined in ://内核用struct page 结构体 代表每个物理页面struct page {   

 Using TimersTimers are represented by struct timer_list, which is defined in :struct timer_list {        struct list_head entry;           /* entry in linked list of timers */        unsigned long

 Jiffies（我感觉它是个全局变量）The global variable jiffies holds the number of ticks that have occurred since the system booted. On boot, the kernel initializes the variable to zero, and it is incremented by o

 The objdump and readelf utilities display any of the information in object files (for objdump),or in ELF files (for readelf) ,Through command-line arguments you can use the command to look at the hea

 The output of our module is generated by printk(); This function prints to the system file /var/log/messages by default. we can views this type: tail /var/log/messages//动态的观察这个文件

To tell the truth , I do not know  exactly the methods to use the shared Irq in functions.It remains to be settled in the future.int request_irq(unsigned int irq,                irqreturn_t (*handle

 TaskletsThe Tasklet StructureTasklets are represented by the tasklet_struct structure. Each structure represents a unique tasklet. The structure is declared in :struct taskl

                                Indeed, they are often called synchronous interrupts . Exceptions are produced by the processor while executing instructions either in response to a programming error

*****************************************************************************************************************************Chapter 3. Processes  只记录了一些记忆有点模糊的和不太懂的***********************************