If there's interest I'd be happy to write a hint on installing and
using the latest Xen Project hypervisor (4.9.0) on the latest LFS
(8.0).  It is a lot easier than in years past, but still a few gotchas
that took awhile to work out.

I read through all mentions of 'xen' on the LFS lists and it comes up
from time to time, but I get the sense that a lot of people who might
be interested are turned away by the long list of dependencies.
However, I successfully built xen without x11 or multiarch and am
running LFS 8.0 as both dom0 and domU.  No external kernel patches are
required.  I have not tried running 32-bit guests, any flavor of
windows, HVM, nor have I tried running X11 in either the dom0 or the
guests.  Pure 64-bit LFS 8.0 works wonderfully as a paravirtual guest
with no special guest extensions required.

Given its popularity as the leading open source type-1 hypervisor, I
think learning Xen is a valuable exercise and has many performance
advantages over type-2 solutions like kvm/qemu and Virtualbox.  Now
that I have a working LFS 8.0 domU, I've created a snapshot which can
then be cloned as needed to be the foundation for various specialty
VMs (web, database, mail, hadoop, spark, etc.)  I feel much safer this
way, since I have a long history of turning perfectly good systems
into expensive space heaters.  With Xen, I can feel free to experiment
because when my next clever idea wipes out /usr/lib, I can just trash
the VM and start with a fresh copy!

virtualization means never having to say you're sorry!
czep
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