bootloader: Simplify tuning of rpm-ostree kargs #690
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The bootloader plugin claims that it does not mess with existing kernel parameters; make sure we adhere to that also for rpm-ostree systems: 1. Only append a new karg if the same key=value pair does not already appear in kernel parameters. If we would duplicate it, it would not be possible to determine which one to delete when unapplying the profile. 2. Do not delete existing key=value pairs when the profile adds a karg with another value for the key. A single key can appear multiple times in the kernel parameter list with different values. Also make sure new kargs are added exactly in the order in which they appear in the profile. This is especially important for kargs related to hugepages. Resolves: RHEL-45836
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This PR aims to simplify the tuning of kernel parameters in rpm-ostree systems, which has some major flaws:
The new implementation is much simpler, but it also restricts the user more, since it disallows replacing existing kernel parameters.
Setting to WIP, since I'm still doing testing on Fedora CoreOS virtual machines.