Difference between revisions of "Kernel module package guidelines"
(remove language suffix from Category:Package development (English), see Talk:Table of Contents#English Category Names: Capitalization and Conflict with i18n)
(Template:i18n is deprecated, use interlanguage links, see Help talk:I18n#"Dummy" interlanguage links and deprecation of Template:i18n)
|(One intermediate revision by the same user not shown)|
|Line 1:||Line 1:|
Kernel Module Package Guidelines
Revision as of 11:21, 13 June 2012
Packages that contain kernel modules should be treated specially, to support users who wish to have more than one kernel installed on a system.
When packaging software containing a kernel module and other non-module supporting files/utilities, it is important to separate the kernel modules from the supporting files.
When packaging such software (using the NVIDIA drivers as an example) the convention is:
- create an
nvidiapackage containing just the kernel modules built for the vanilla kernel
- create an
nvidia-utilspackage containing the supporting files
- make sure
nvidia-utils(unless there's a good reason not to do so)
- for another kernel like
nvidia-mmcontaining the kernel modules built against that kernel which provides nvidia and also depends on
- make sure
nvidia dependson the current major kernel version, for example:
depends=('kernel26>=2.6.24-2' 'kernel26<2.6.25-0' 'nvidia-utils')
Note that it is
-1 in above example - this is because there was a configuration change to important kernel subsystem that required all modules to be rebuilt. You should always change depends version in such cases, otherwise some people with out-of-sync kernel and module version will report that module is broken.
While kernel modules built for different kernels always live in different directories and can peacefully coexist, the supporting files are expected to be found in one location. If one package contained module and supporting files, you would be unable to install the modules for more than one kernel because the supporting files in the packages would cause pacman file conflicts.
The separation of modules and accompanying files allows multiple kernel module packages to be installed for multiple kernels on the same system while sharing the supporting files among them in the expected location.
If a package includes a kernel module that is meant to override an existing module of the same name, such module should be placed in the
/lib/modules/2.6.xx-ARCH/updates directory. When depmod is run, modules in this directory will take precedence.