On Thu, 20 Dec 2018 00:59:35 +1100, Ralph wrote in message
<c8fde44f-6df4-4e28-08a5-059b978878de@???>:

> There is this notion of "kexec boot"; I've never tried it, but it's
> documentation claims "kexec is a system call that enables you to
> load and boot into another kernel from the currently running kernel."
>
> Maybe it comes with too many ifs and buts to be a viable approach.
>
> Ralph.

..I used to "kexec reboot" a lot in my pre-systemd Debian days,
AFAIR, bought me nice long uptimes with new kernels. ;o)

--
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.