全部博文（116）
发布时间：2014-02-08 07:48:12
Key difference: A cache transparentlystores data so that future requests for that data can be served faster. Abuffer, on the other hand, temporarily stores data while the data is theprocess of moving from one place to another. There are two main types of cach.........【阅读全文】
发布时间：2014-02-07 17:20:26
initrd 的英文含义是 boot loader initialized RAM disk，就是由 boot loader 初始化的内存盘。在 linux内核启动前，boot loader 会将存储介质中的 initrd 文件加载到内存，内核启动时会在访问真正的根文件系统前先访问该内存中的 initrd 文件系统。在 boot l.........【阅读全文】
发布时间：2014-02-07 16:34:35
Linux初始 RAM磁盘（initrd）是在系统引导过程中挂载的一个临时根文件系统，用来支持两阶段的引导过程。initrd文件中包含了各种可执行程序和驱动程序，它们可以用来挂载实际的根文件系统，然后再将这个 initrd RAM 磁盘卸载，并释放内存。在很多嵌入式Linux 系统中，initrd 就是最终的根文件系统。.........【阅读全文】
发布时间：2014-02-06 18:08:43
What is initramfs? ------------------ All 2.6 Linux kernels contain a gzipped "cpio" format archive, which is extracted into rootfs when the kernel boots up. After extracting, the kernel checks to see if rootfs contains a file "init", and if so it executes it as PID1. If found, this init process i.........【阅读全文】
发布时间：2014-02-06 11:14:17
What is rootfs? --------------- Rootfs is a special instance of ramfs (or tmpfs, if that's enabled), which is always present in 2.6 systems. You can't unmount rootfs for approximately the same reason you can't kill the init process; rather than having special code to check for and handle an empt.........【阅读全文】
