Difference between revisions of "Debian-kernel"

__NOTOC__

= Real-Time Vanilla Kernel =

== Get sources and setup environment ==

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

<pre><nowiki>

mkdir -p /usr/src/vanilla

cd !$

</nowiki></pre>

# Download the latest rt patch

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

# Download the matched kernel for the proper patch downloaded in previous step

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

# Decompress both, the linux kernel sources and the patch

<pre><nowiki>

tar jxvf *.bz2

</nowiki></pre>

# Patch the kernel

<pre><nowiki>

cd linux-2.6.AA.BB

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

</nowiki></pre>

# Create a link `linux` which points to the linux kernel sources

<pre><nowiki>

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

</nowiki></pre>

== Build Kernel ==

# Go to the linux source folder

# Configure the kernel, if necessary `make menuconfig`

## Backup the old config file

<pre><nowiki>

cd /usr/src/linux

cp .config config.yy-mm-dd

</nowiki></pre>

# When finish save your changes

# Build the bzImage

<pre><nowiki>

cd /usr/src/linux

make

</nowiki></pre>

# If only modules are needed, then use `make modules`

# Install the modules

<pre><nowiki>

make modules_install

</nowiki></pre>

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

<pre><nowiki>

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

</nowiki></pre>

# Create initial root filesystem

<pre><nowiki>

cd /usr/src/linux

update-inintramfs -c -k 2.6.AA-BB-rtNN

</nowiki></pre>

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

<pre><nowiki>

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

</nowiki></pre>

* '''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.