1、查看系统当前内核
uname -r
3.10.0-693.5.2.el7.jd_3313.x86_64
2、安装内核使用的yum仓库
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
3、查看哪些内核可供安装
# yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
elrepo-kernel | 3.0 kB 00:00:00
elrepo-kernel/primary_db | 2.0 MB 00:00:02
Loading mirror speeds from cached hostfile
* elrepo-kernel: ftp.ne.jp
可安装的软件包
elrepo-release.noarch 7.0-5.el7.elrepo elrepo-kernel
kernel-lt.x86_64 5.4.170-1.el7.elrepo elrepo-kernel
kernel-lt-devel.x86_64 5.4.170-1.el7.elrepo elrepo-kernel
kernel-lt-doc.noarch 5.4.170-1.el7.elrepo elrepo-kernel
kernel-lt-headers.x86_64 5.4.170-1.el7.elrepo elrepo-kernel
kernel-lt-tools.x86_64 5.4.170-1.el7.elrepo elrepo-kernel
kernel-lt-tools-libs.x86_64 5.4.170-1.el7.elrepo elrepo-kernel
kernel-lt-tools-libs-devel.x86_64 5.4.170-1.el7.elrepo elrepo-kernel
kernel-ml.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
kernel-ml-devel.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
kernel-ml-doc.noarch 5.16.0-1.el7.elrepo elrepo-kernel
kernel-ml-headers.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
kernel-ml-tools.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
kernel-ml-tools-libs.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
kernel-ml-tools-libs-devel.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
perf.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
python-perf.x86_64 5.16.0-1.el7.elrepo elrepo-kernel
4、安装
yum -y --enablerepo=elrepo-kernel install kernel-ml
5、设置Grub启动项
编辑 /etc/default/grub 并设置 GRUB_DEFAULT=0
# vim /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved #这里把saved改为0即可
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="rhgb quiet"
6、重启系统
# grub2-mkconfig -o /boot/grub2/grub.cfg
# reboot
