How to install Real Time Kernel patch on Linux(Ubuntu 16.04)

Hasan Men

How to install Real Time Kernel patch on Linux(Ubuntu 16.04)

  1. Install Ubuntu on Virtual box or Real hardware.
  2. Download a kernel 
     https://www.kernel.org/
    • What means Number/version 4.13.15
      • 4: Kernel version
      • 13: Major revision
      • 15: Minor revision
    • ! Kernel version and major revision number must be the same.
    • Create Kernel directory and download kernel source into the directory. 
       mkdir Kernel && cd Kernel
 wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.13.15.tar.xz
  3. Download RT-Patch into the Kernel directory. 
     https://wiki.linuxfoundation.org/realtime/preempt_rt_versions
 https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.13/

    Download it

     wget https://cdn.kernel.org/pub/linux/kernel/projects/rt/4.13/patch-4.13.13-rt5.patch.gz
  4. Extract Kernel source and patch it. 
    tar xvf linux-4.13.15.tar.xz
cd linux-4.13.15

    Patch it

    gzip -cd ../patch-4.13.13-rt5.patch.gz | patch -p1 --verbose

  5. Install libncurses5-dev and libssl-dev to enable real time processing and compiling packages. 
     sudo apt-get install libncurses5-dev
 sudo apt-get install libssl-dev
 sudo apt-get install libelf-dev
  6. Configure Makefile before compiling kernel. This configure will open Real time preemt options. 
     make menuconfig

    Select Fully Preemtible Kernel option from

    1. Processor type and features
    2. Preemption Model (Voluntary Kernel Preemption (Desktop))
    3. Fully Preemptible Kernel (RT)
      MenuConfig1

    Go upper menu with ESC-ESC key. Deselect stack overflows if selected.

    1. Kernel hacking –> [Enter]
    2. Memory Debugging [Enter]
    3. Check for stack overflows MenuConfig1 Go upper menu and save(RIGHT_ARROW) .config file.
  7. Compile Kernel source file 
     make

    NOTE: You can use “make -jX” option if you have thread support. X is number of core + 1. It will compile faster. For VirtualBox use this.

     make -j2

    Wait until compilation done. It can take 3-4 hour on VirtualBox.

  8. Make modules and install 
     sudo make modules_install -j2
 sudo make install -j2
  9. Check new kernel file and update grub boot loader to start Linux with new RT-Kernel. 
     cd /boot
 ls
    • You will see new kernel. LS_GRUB
    • Now update grub and reboot machine. 
       sudo update-grub
 sudo reboot
  10. Check kernel version to be sure. 
    uname -a
    • Old Kernel(Ubuntu SMP 4.10.0) MenuConfig1
    • New Kernel(PREEMPT RT 4.13.15) MenuConfig1