Debian-kernel

GNU/Debian Kernel setup

Kernel from Debian repositories

Get the sources and setup the environment

1. Install the proper packages to build the kernel

 apt-get install ncurses-dev fakeroot kernel-package build-essential devscripts
 

1. Build kernel dependencies

 apt-get build-dep linux-2.6
 

1. Get Debian kernel sources

 apt-get source linux-2.6
 

• Note that `deb-src` must be present on `/etc/apt/sources.list` file

Build Debian Kernel

1. If kernel is patched, check it twice as follows

 make -f debian/rules source-all
 

• First time must fail
• If building all kernel related packages, then do as follows. It takes almos 40GB on Hard drive.

 ~/src/linux-2.6-2.6.24~rc6$ debuild -e DEBIAN_KERNEL_JOBS=${NR_CPUS}
 

• If building an specific architecture, then

 fakeroot make -f debian/rules.gen setup_i386_none_k7
 

• This will build the packages for AMD K7
• If there is any change to apply, then go the the `k7` folder and config the kernel

 debian/build/build_i386_none_k7
 make menuconfig
 

• Build the kernel

 fakeroot make -f debian/rules.gen binary-arch_i386_none_k7 binary-indep DEBIAN_KERNEL_JOBS=${NR_CPUS}
 

Install Debian Kernel

Kernel packages will be created in `/usr/src` folder. Install them as any other deb package

 dpkg -i linux*.deb
 

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 RT 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
 

Install RT Kernel

• 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.