@ryanc after overcoming kernel issues I was / will be dealing with net booting RHEL installer and using an NFS root without using an initrd at work.

Weird memory thing on an IBM Power 10 server which still has the 256 MB memory region not able to hold kernel and initrd in memory.

Something about Power 10 changes the way memory is allocated. Seems as if the kernel needs to negotiate more memory. But GRUB doesn’t do that.

IBM’s answer is to change a frame configuration setting. But that requires a full frame outage. And there are production LPARs on this frame.