I would like to activate the PREEMPTion features of my Linux Kernel. To do that I should download the right patch matching the version of the kernel I am using and that I compiled (as explained here). The version of the kernel I have is the Linux version 4.9.0 (obtained just typing uname -a from the command line and double checked in /proc/version.
In the linux kernel page (where is possible to download the patch for this purpose) I cannot find the exact matching version that I am using. Which one should I use?
Also, if you have some suggestion on how to do it properly it will be appreciated!
The other question I have is: can I continue to use the same application I have developed observing, when possible, the improvement or degradation of performance? And what about the driver I was developing? or third parts device-driver?
UPDATE:
I am using a Xilinx Zynq Ultrascale+ equipped with a quad core ARM 53. The board used is the zcu102 by Xilinx.
The source files of the kernel come from here and the file system is Linaro
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Answer
- You can check folder “older” ( https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/4.9/older/ ) – there you can find files patch-4.9-rt1.patch.gz and patches-4.9-rt1.tar.gz
- Note, that current version in github.com/Xilinx/linux-xlnx is 4.14. Are you sure, that you have correct source code?