kexec should work to test new kernels and initrds safely (just reboot if it goes wrong), but I haven't tried it myself. If it works, you should be able to pass kernel arguments to "boot" into a disk image and keep everything else untouched.
Also, I think this thread belongs to the developer sub-forum since it isn't part of Nickel.
Last edited by geek1011; 01-12-2021 at 03:22 PM.
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