kernel挂载LVM root分区一定要用initrd吗？

songtime

新编译了个内核，把Device-mapper编译进去了（不知道为什么没发现LVM）.却发现没有使用Initrd起动不起来。

至尊宝

没记错的话，Linux启动过程中，进入kernel stage之后initrd (initramfs)初始化过程结束之前，会加载虚拟设备，其中包括LVM和软RAID。

在OEL和自己的Ubuntu(LVM)中看了一下，启动参数中都有指定initrd镜像。

When the kernel is loaded, it immediately initializes and configures the computer's memory and configures the various hardware attached to the system, including all processors, I/O subsystems, and storage devices. It then looks for the compressed initramfs image(s) in a predetermined location in memory, decompresses it directly to /sysroot/, and loads all necessary drivers. Next, it initializes virtual devices related to the file system, such as LVM or software RAID, before completing the initramfs processes and freeing up all the memory the disk image once occupied.

http://www.redhat.com/docs/en-US ... hutdown-kernel.html