Re: VKernel progress update - 9 Jan 2006

[Bill Huey (hui) <billh@xxxxxxxxxxxxxxxxx>]

On Thu, Jan 11, 2007 at 10:59:39AM -0800, Matthew Dillon wrote:
. ..
>     Linux has something similar (UML), but no BSD system has this feature.
>     All the BSDs rely on third party hardware virtualization (vmware, xen,
>     qemu, etc).
> 
>     The linux code is fairly opaque.  It is almost universally without any
>     code comments so I am not sure whether they are using a real page table
>     (requiring UML to run as root), or whether they are using a virtualized
>     page table like we are (which allows us to run without needing root
>     creds).  Inquiring minds want to know!

Linux also has KVM now and that does Xen kind of stuff. The last time I
looked at UML their arch directory was basically replaced with UML specific
stuff and it was pretty strictly bounded to userspace with no directly
kernel support.

bill