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5 文件Cache相关API及其实现Linux内核中与文件Cache操作相关的API有很多，按其使用方式可以分成两类：一类是以拷贝方式操作的相关接口，如read/write/sendfile等，其中sendfile在2.6系列的内核中已经不再支持；另一类是以地址映射方式操作的相关接口，如mmap等...

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Linux内核文件cache管理机制介绍

1 操作系统和文件Cache管理操作系统是计算机上最为重要的软件，他负责管理计算机的各种硬件资源，并将这些物理资源抽象成各种接口供上层应用使用。所以从程序的角度看，操作系统就好比是一个虚拟机，这个虚拟机不提供各种硬件资源的具体细节，而仅仅提供进程、文件、地址空间以及进程间通信等等逻辑概念...

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