│ │ ( ) No Forced Preemption (Server)
│ │ ( ) Voluntary Kernel Preemption (Desktop)
│ │ ( ) Preemptible Kernel (Low-Latency Desktop)
│ │ ( ) Preemptible Kernel (Basic RT)
│ │ (X) Fully Preemptible Kernel (RT)
另外，kernel中需支持tickless和高精度timer：
┌───────────────────Processor type and features ─────────────────────────┐
│ │ [*] Tickless System (Dynamic Ticks)
│ │ [*] High Resolution Timer Support
make modules_install、make install、mkintramfs后，我们得到一个可以在Ubuntu中启动的RT kernel。具体编译方法可详见，根据该文修改版本 号等信息即可，我们运行的命令包括：
安装模块
barry@barry-VirtualBox:~/development/linux-2.6$ sudo make modules_install
....
INSTALL /lib/firmware/whiteheat_loader.fw
INSTALL /lib/firmware/whiteheat.fw
INSTALL /lib/firmware/keyspan_pda/keyspan_pda.fw
INSTALL /lib/firmware/keyspan_pda/xircom_pgs.fw
INSTALL /lib/firmware/cpia2/stv0672_vp4.bin
INSTALL /lib/firmware/yam/1200.bin
INSTALL /lib/firmware/yam/9600.bin
DEPMOD 3.4.11-rt19
安装kernel
barry@barry-VirtualBox:~/development/linux-2.6$ sudo make install
sh /home/barry/development/linux-2.6/arch/x86/boot/install.sh 3.4.11-rt19 arch/x86/boot/bzImage \
System.map "/boot" 制作initrd
barry@barry-VirtualBox:~/development/linux-2.6$ sudo mkinitramfs 3.4.11-rt19 -o /boot/initrd.img-3.4.11-rt19修改grub配置
在grub.conf中增加新的启动entry，仿照现有的menuentry，增加一个新的，把其中的相关版本号都变更为3.4.11-rt19，我们的修改如下：
menuentry 'Ubuntu, with Linux 3.4.11-rt19' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set a0db5cf0-6ce3-404f-9808-88ce18f0177a
linux /boot/vmlinuz-3.4.11-rt19 root=UUID=a0db5cf0-6ce3-404f-9808-88ce18f0177a ro quiet splash
initrd /boot/initrd.img-3.4.11-rt19
}
开机时选择3.4.11-rt19启动：
