[elrepo] RHEL8 kernels immediately overwritten

[Joseph Christopher Sible]

I'm using kernel-ml on both RHEL7 and RHEL8 systems. On my RHEL7
systems, it works the way I want it to, which is also how the stock
kernels on both RHEL versions work: up to three of the kernel-ml
kernels exist at a time, and when yum updates them, it installs a new
kernel-ml package, and if there would be more than three, it also
uninstalls the oldest that isn't currently running.

However, on my RHEL8 systems, kernel-ml behaves like any other package:
there's only one of it at a time, and when yum updates it, the old one
is immediately overwritten, even if it's the running kernel. In
particular, this is a problem because once I install a kernel-ml
update, I can't load any new kernel modules until I reboot (since all
of the modules for my running kernel have been deleted). Is there a way
to get the other behavior back on RHEL8?

Joseph C. Sible