Debian-kernel

Real-Time Vanilla Kernel

Get sources and setup environment

1. Create `vanilla` folder in `/usr/src` and change directory to such location

 mkdir -p /usr/src/vanilla
 cd !$
 

1. Download the latest rt patch

http://www.kernel.org/pub/linux/kernel/projects/rt/

1. Download the matched kernel for the proper patch downloaded in previous step

http://www.kernel.org/pub/linux/kernel/v2.6/

1. Decompress both, the linux kernel sources and the patch

 tar jxvf *.bz2
 

1. Patch the kernel

 cd linux-2.6.AA.BB
 patch -p1 <../patch-2.6.AA.BB-rtNN
 

1. Create a link `linux` which points to the linux kernel sources

 ln -s /usr/src/vanilla/linux-2.6.AA.BB /usr/src/linux
 

Build Kernel

1. Go to the linux source folder
2. Configure the kernel, if necessary `make menuconfig`
   • Backup the old config file

   cd /usr/src/linux
   cp .config config.yy-mm-dd
   

• When finish save your changes
• Build the bzImage

 cd /usr/src/linux
 make
 

• If only modules are needed, then use `make modules`
• Install the modules

 make modules_install
 

1. Install the kernel, usually locate on `arch/MY_ARCH/boot` in kernel sources

 cp arch/MY_ARCH/boot/bzImage /boot/vmlinuz-2.6.AA.BB-rtNN
 

1. Create initial root filesystem

 cd /usr/src/linux
 update-inintramfs -c -k 2.6.AA-BB-rtNN
 

1. Add the proper entry to grub in `/boot/grub/menu.lst`

 title		RT kernel 2.6.AA.BB-rtNN
 root		(hd0,0)
 kernel		/boot/vmlinuz-2.6.AA.BB-rtNN root=/dev/hda1 ro
 initrd		/boot/initrd.img-2.6.AA.BB-rtNN
 

• TIP: if `default` parameter is set to `0` at the beginning of the `menu.lst` file, then try to put this entry at the top of the entries list.