View Source: KernelDevelopment - Waikato Linux Users Group

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!! Tools for LinuxKernel development

* [Ostra]
* [Sparse]
* [Git]; see See KernelDevelopmentWithGit
* [OProfile]

!! Resources

* KernelDevelopmentDebugging
* [Linux kernel source cross reference | http://lxr.linux.no/]
* [Hacking the Linux 2.6 kernel, Part 1: Getting ready | http://www-128.ibm.com/developerworks/linux/edu/l-dw-linux-kernelhack1-i.html]
* [Hacking the Linux 2.6 kernel, Part 2: Making your first hack | http://www-128.ibm.com/developerworks/linux/edu/l-dw-linux-kernelhack2-i.html]
* [Linux Kernel in a Nutshell | http://www.kroah.com/lkn/]

!! Some notes

You can use [DistCC] or [ccache | http://ccache.samba.org/] (or both) to speed up compilation.

The main trick is to only make ONE target on the command line. i.e. don't try and do this <tt>make -j6 CC=distcc all modules_install</tt> or else the build will get screwed up and the whole thing will get remade each time.

Instead do this:
<verbatim>
make -j6 CC=distcc all
make modules_install INSTALL_MOD_PATH=~/tmp
</verbatim>

To update the .config file with questions for new options do a <tt>make oldconfig</tt>

To output build files to another directory (so you don't mix source and object code) do <tt>make O=outputdir all</tt>

To make files in just one source code directory do <tt>make dir</tt>. To make the modules in a directory and link them do <tt>make M=dir</tt>. Remember to put a trailing slash after the directory name.

NB The above two may require you to have built your config etc first.

To enable extra error checks when compiling do <tt>make EXTRA_CFLAGS=-W</tt>.

A script to copy a new [LinuxKernel] to remote machines:''''

  <verbatim>
  #! /bin/bash
  # syntax m machine_num directory version
  H=/home/ian
  SRC=$H/linuxsrc/$2
  VER=$3
  rm $H/tmp/lib/modules/$VER/build
  rm $H/tmp/lib/modules/$VER/source
  rsync $SRC/System.map root@jandi$1:/boot/System.map-$VER
  rsync $SRC/arch/i386/boot/bzImage root@jandi$1:/boot/vmlinuz-$VER
  rsync $SRC/vmlinux root@jandi$1:/boot/vmlinux-$VER
  rsync -av $H/tmp/lib/modules/$VER root@jandi$1:/lib/modules
  </verbatim>

It has also been suggested to use kgdb with qemu and/or kgdboe to help with debugging.

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CategoryKernel
15 pages link to KernelDevelopment:
Last edited on Wednesday, June 13, 2007 9:18:45 am by IanMcDonald
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