unsignedintname_len;shortintstatus;intsub_tasks;intsubtasks_completed;structlist_head completed_subtasks;/*list structure*/intsubtasks_waiting;structlist_head waiting_subtasks;/*another list of same or different items!*/structlist_head todo_list;/*list of todo_tasks*/}; 在linux kernel 里面有...
2. 双向链表(list)linux内核中的双向链表通过结构 struct list_head来将各个节点连接起来,此结构会作为链表元素结构中的一个参数:struct list_head { struct list_head *next, *prev; };链表头的初始化,注意,结构中的指针为NULL并不是初始化,而是指向自身才是初始化,如果 本文介绍linux内核中一些常用的数据结构...
linux kernel documents 《Linux kernel in a nutshell》 Kernel Parameters ~~~ The following is a consolidated list of the kernel parameters as implemented (mostly) by the __setup() macro and sorted into English Dictionary order (defined as ignoring all punctuation and sorting digits before letters ...
更像一个“如何工作”的书,帮助读者理解代码实现。 It presents kernel functions and data structures, steps the reader through them, but does not, for example, emphasize the rules for using them. UTLK is a study guide, not a programming manual. 本书描述了内核函数和数据结构,引导读者穿行于其间,...
testlist_init(void) { struct student *stu1,*stu2,*stu3,*stu4; struct student *stu; LIST_HEAD(stu_head); stu1 = kmalloc(sizeof(*stu1),GFP_KERNEL); stu1->id = 1; stu1->name = "laoyl"; INIT_LIST_HEAD(&stu1->list); stu2 = kmalloc(sizeof(*stu2),GFP_KERNEL); stu2->...
yum install gcc kernel-devel-$(uname-r) 成功安装后,会在/usr/src/kernels/目录内出现一个以当前内核版本和架构命名的子目录,内含大量的C语言头文件: 图3:正确安装情况下的kernels目录 由于目前部分Linux内核函数/结构体的系统性文档比较少,必要时可以在这里直接阅读头文件源码。
The method shown above isn’t the fastest or most efficient way to invoke tar on a compressed archive, and it wastes disk space and kernel I/O time. A better way is to combine archival and compression functions with a pipeline. For example, this command pipeline unpacks .tar.gz: 上述方...
所以Linux创建了4个段,__KERNEL_CS、__KERNEL_DS用于内核空间,__USER_CS、__USER_DS用于用户空间,它们在会空间切换时自动切换,这样CPU特权级就跟着切换了。对于x86 64,从硬件上基本屏蔽了分段,因为硬件规定CS、DS、ES、SS这些段的段基址必须是0,段限长必须是最大值,软件设置其它值也没用。因此我们在这里要...
5 struct list_head list; 6 dev_t dev; 7 unsigned int count; 8 }; 复制代码 这里的话还要申请一个cdev 结构体的空间 通过cdev_alloc() ; 搞定了主次设备号的问题 , 接下来就是涉及到了初始化和添加到设备列表 . linux kernel 为我们提供了以下的方法: ...
Scheduling initialization is located relatively late in start_kernel. At this time, memory initialization has been completed, so you can see that memory application functions such as kzmalloc can already be called in sched_init. sched_init needs to initialize the run queue (rq) for each CPU, ...