http://bbs.chinaunix.net/thread-3628928-1-1.html
A:local_irq_disable就是调用的汇编指令 cli，所以是禁止中断。
disable_irq是将相应的irq的desc->status |= IRQ_DISABLE， 所以是屏蔽中断。
禁止中断和屏蔽中断的区别就是，cli后，不会产生中断信号； disable后会产生中断信号，但是不会处理中断，只是置位IRQ_PENDING
非常好的分析的文章:
http://www.ibm.com/developerworks/cn/linux/l-cn-linuxkernelint/index.html#resources
http://bbs.chinaunix.net/thread-2015970-1-1.html
http://www.ibm.com/developerworks/cn/linux/l-affinity.html
http://www.linuxidc.com/Linux/2011-02/32129.htm
http://www.vrlinux.com/naheyuanma/20100404/12340_2.html
http://wenku.baidu.com/view/98118ad1240c844769eaee72.html
http://bbs.chinaunix.net/thread-1979496-1-1.html 在多核系统上网络数据转发实验和一点思考
西邮兴趣小组
http://edsionte.com/techblog/archives/1495 什么是中断？
http://edsionte.com/techblog/archives/1618 与中断有关的数据结构
http://edsionte.com/techblog/archives/1539 对中断进行上部分和下部分的划分
http://edsionte.com/techblog/archives/1547 中断下半部-tasklet
http://edsionte.com/techblog/archives/1582 中断下半部-工作队列
http://edsionte.com/techblog/archives/1521 你的第一个中断程序！
http://www.kerneltravel.net/journal/viii/01.htm 中断解析
中断的应用
/*
usage: Compiling this file by make
and using the following command to insert the mode which the make generated just now
command: sudo insmod filename.ko irq=1 devname=myirq
This interrupt shared the one irq with keyboard
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
static int irq;
static char* devname;
static struct tasklet_struct mytasklet;
module_param(irq,int,0644);
module_param(devname,charp,0644);
struct myirq
{
int devid;
};
struct myirq mydev={1119};
static void mytasklet_handler(unsigned long data)
{
printk("tasklet is wroking..\n");
}
static irqreturn_t myirq_handler(int irq,void* dev)
{
struct myirq mydev;
static int count=0;
mydev=*(struct myirq*)dev;
printk("key:%d..\n",count+1);
printk("devid:%d ISR is working..\n",mydev.devid);
printk("Bottom half will be working..\n");
tasklet_init(&mytasklet,mytasklet_handler,0);
tasklet_schedule(&mytasklet);
printk("ISR is leaving..\n");
count++;
return IRQ_HANDLED;
}
static int __init myirq_init()
{
printk("Module is working..\n");
if(request_irq(irq,myirq_handler,IRQF_SHARED,devname,&mydev)!=0)
{
printk("%s request IRQ:%d failed..\n",devname,irq);
return -1;
}
printk("%s rquest IRQ:%d success..\n",devname,irq);
return 0;
}
static void __exit myirq_exit()
{
printk("Module is leaving..\n");
free_irq(irq,&mydev);
printk("%s request IRQ:%d success..\n",devname,irq);
}
module_init(myirq_init);
module_exit(myirq_exit);
MODULE_LICENSE("GPL");
cat /proc/interrupts出来的
IO-APIC-edge
IO-APIC-level
之间的区别
http://www.douban.com/note/52173385/
normalnotebook的几篇异常精彩的文章
http://blog.csdn.net/normalnotebook/article/details/1649770