http://bicofino.io/2014/10/25/install-kernel-3-dot-10-on-centos-6-dot-5/
https://gree2.github.io/linux/2017/05/17/centos-65-install-kernel-310
/etc/grub.conf
先看看里边的内容，确认是否安装了新的内核，然后设置默认启动项即可。
https://unix.stackexchange.com/questions/440971/centos-7-updated-kernel-to-kernel-3-10-0-862-using-yum