kernel level virtualisation requirements.

[Ivan Voras]

Andrea Campi wrote:

> In para-virtualization you modify the kernel source in such a way that
> accesses to the hardware are instead translated into calls to the
> hypervisor. This means you could simply write device drivers for a
> "virtual network adapter", "virtual disk" etc. What this buys you is
> that you can have a full kernel (say 6.x) running as a hypervisor, and
> trimmed down kernels (say 7.x and several 6.x versions), compiled with
> only the virtual device drivers, running as additional VMs.

> WDYT?

Well Xen does paravirtulization like you described (and I agree
something like that is more flexible then jails, if supported by other
operating systems). DragonflyBSD has its own flavor of virtualization
similar to user mode Linux, but it has greatly diverged from FreeBSD so
it't probably not trivially portable.

Or do you mean something like this:
http://feanor.sssup.it/~fabio/freebsd/lkvm/ ?

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