Junpei Xia wrote:
A question: I have /boot and / both as separate partitions, can I put them under LVM? Is it dangerous to do so?
Dangerous ? Not quite. Problematic ? Easily. You need to ensure you have LVM support in your initrd. I personally avoid doing that for this reason and also for the fact that my / (which includes by /boot directory) size is very predictable/constant.
HTH, Bob