首先升级内核到3.10
1、导入public key
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
2、安装ELRepo到CentOS-6.5中
rpm -ivh http://www.elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm
3、安装 kernel-lt（lt=long-term）
yum --enablerepo=elrepo-kernel install kernel-lt -y
或者安装kernel-ml（ml=mainline）
yum --enablerepo=elrepo-kernel install kernel-ml -y
4、编辑grub.conf文件，修改Grub引导顺序
vim /etc/grub.conf
<pre>

grub.conf generated by anaconda

Note that you do not have to rerun grub after making changes to this file

NOTICE: You have a /boot partition. This means that

all kernel and initrd paths are relative to /boot/, eg.

root (hd0,0)

kernel /vmlinuz-version ro root=/dev/mapper/VolGroup-lv_root

initrd /initrd-[generic-]version.img

boot=/dev/sda

default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (3.10.104-1.el6.elrepo.x86_64)
root (hd0,0)
kernel /vmlinuz-3.10.104-1.el6.elrepo.x86_64 ro root=/dev/mapper/VolGroup-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=VolGroup/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=VolGroup/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
initrd /initramfs-3.10.104-1.el6.elrepo.x86_64.img
title CentOS (2.6.32-431.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-431.el6.x86_64 ro root=/dev/mapper/VolGroup-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=VolGroup/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=VolGroup/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
initrd /initramfs-2.6.32-431.el6.x86_64.img

</pre>

5.修改default的值, 然后重启就升级完成了

但是有会出现一个问题, 使用 yum 安装 kernel-devel会发现安装的还是老的版本, 这时可以去

https://pkgs.org/centos-6/elrepo-kernel-x86_64/kernel-lt-devel-3.10.104-1.el6.elrepo.x86_64.rpm.html
下载对应的版本 然后安装就可以了