Source Insight is a powerful project-oriented programming editor, code browser, and analyzer that helps you understand code, while you work and plan. Source Insight has built-in dynamic analysis for C/C++, C#, Java, Objective-C, and more. 使用Source Insight阅读Linux内核代码是很方便的,面对那么...
kernel_linux_common_modules 介绍 仓用途:为Linux内核通用模块放置仓,为各内核领域公共仓。该仓不提供任何特性或能力,仅为集中容纳各内核独立模块,方便内核仓管理。 适用模块:通用内核模块,可在OpenHarmony支持的任何Linux内核版本上使用。对特定平台或硬件等依赖的模块不适合合入该仓。
七、io完成后硬件发送中断通知设备驱动程序 这里针对single queue linux block layer描述(从linux3.13版本开始合入了multi-queue)。 read操作由于等待磁盘io数据,所以当前进程阻塞睡眠在某个cpu等待队列上。当io完成后,硬件发送中断通知系统中的某个cpu(现在的系统,中断都是发送给某个cpu,而不是所有的cpu),但接收到...
LinuxKernel组成员不赞成在kernel中独立的读写文件(这样做可能会影响到策略和安全问题),对内核需要操作的文件内容,最好由应用层配合完成。 这些函数的正确运行需要依赖于进程环境,因此,有些函数不能在中断的handle或Kernel中不属于任何进程的代码中执行,否则可能出现崩溃,要避免这种情况发生,可以在kernel中创建内核线程,...
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RCU(Read-Copy Update)是Linux内核比较成熟的新型读写锁,具有较高的读写并发性能,常常用在需要互斥的性能关键路径。在kernel中,rcu有tiny rcu和tree rcu两种实现,tiny rcu更加简洁,通常用在小型嵌入式系统中,tree rcu则被广泛使用在了server, desktop以及android系统中。本文将以tree rcu为分析对象。
Issue Kernel logged Voluntary context switch within RCU read-side critical section! message followed by WARNING: CPU: 2 PID: 374862 at kernel/rcu/tree_plugin.h:316 rcu_note_context_switch+0x247/0x260 warning.Environment Red Hat Enterprise Linux 9 be2net module ...
1. Introduction 1.1. Linux Versus Other Unix-Like Kernels 1.2. Hardware Dependency 1.3. Linux Versions 1.4. Basic Operating System Concepts 1.4.1. Multiuser Systems 1.4.2. Users and Groups 1.4.3. Processes 1.4.4. Kernel Architecture 1.5...
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官网地址(5.16.5版本):https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/include/asm-generic/rwonce.h?h=v5.16.5 4.1 WRITE_ONCE “ do { } while (0) ”是“不需要返回值的多语句的宏定义”的最常用形式。 内容共两句话: ...