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Your first kernel mod v2
The source files were tested under Fedora 15 and Fedora 17 Alpha. Full instructions on creating custom Kernel packages for Fedora at: http://fedoraproject.org/wiki/Docs/CustomKernel
Short version: http://goo.gl/eIaUe
After installing the tools, getting the source, preparing the source for building, edit kernel.spec file to change the build name, and to configure it to apply the patch.
Spec: https://github.com/petersenna/Kernel/tree/master/yfkm2/spec
Patch: https://github.com/petersenna/Kernel/tree/master/yfkm2/patch
Use rpmbuild to generate the custom kernel RPMS.
Install the new generated packages: kernel, kernel-header, and kernel-devel.
Reboot.
Go to samples/yfkm2/userspace. Type make. Note that this will not work until the newly generated kernel-devel, and kernel-headers packages are installed.
Open two terminal windows on the machine that are running your custom Kernel. On terminal #1 run top command.
On terminal #2:
$ ps aux |grep top
peter 660 1.6 0.0 15240 1336 pts/0 S+ 21:37 0:00 top
peter 682 0.0 0.0 109364 916 pts/1 S+ 21:37 0:00 grep --color=auto top`
Find what is pid of top. It is 660 on example above.
On terminal #2: Go to samples/yfkm2/userspace dir and call monitor then notifyme.
$ ./monitor 660
Sucess on adding 660!
$ ./notifyme 660
Sucess on adding 660!
Finish 660 to see what happens to me.
Now go to terminal #1 and exit top by pressing 'q'. And watch what happens to the notifyme application on terminal #2:
$ ./notifyme 660
Sucess on adding 660!
Finish 660 to see what happens to me.
Killed
$