I'm beginning to play with Freebsd and Xen, and I'm targeting a VPS provider
who is giving me a large memory instance for a good price. However, he only
supports "ops_pv" kernels, being primarily a linux house.
So, I'm trying to work out what the best approach is. Ideally I'd be running
amd64, but he doesn't want to run an hvmloader. I guess that means that I need
to be running an i386 kernel; hopefully PAE works so that I take advantage of
However, this appears to be an inflexible solution. Doesn't it mean that I will
have no ability to tweak kernel variables, because effectively once it's setup
he will control the boot process - I'll also not be able to upgrade the kernel
easily. Also, no access to single user mode... Ideally I want a boot loader....
So, I was thinking. How do we make the boot loader appear to Xen to be a
paravirtualized kernel? Currently it isn't even an elf object, but what it is
was. How much work do you think that it might be to make a "loader kernel" that
appears to be a kernel, but in fact is a boot strap. The idea being that it
could be run as a "ops_pv" kernel on a Xen platform but otherwise behave
exactly like our boot loader, processing loader.conf, and booting a kernel in
the normal way.
Does anyone have any idea of whether that's a possibility? Or, is there
something fundamental about the pv_ops model that would prevent this?
If this were possible we could boot the amd64 XENHVM kernel in a pv_ops manner,
with full control of the kernel configuration.
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