Re: [Xen-users] Am I running under Xen?

[Matthew Haas <haas@xxxxxxxxxxxxxx>]

Tom Horsley wrote:
> Is there a standard idiom most folks use to ask the
> question: Am I a linux that was just booted under Xen?
>
> I'm thinking about fooling with some of my alternate
> boot partitions so they can be booted as paravirt
> VMs, but they'd need to do a bit of reconfiguring
> of themselves when running under Xen early in the boot
> process (like not trying to mount other partitions
> that are gonna be used by other virtual machines
> and use a different host name, and don't start so many
> system services, etc).
>
> I suppose I could just check and see if the kernel
> name has "xen" in it, but I just wondered if there
> was one true way to ask this question.
 This is actually a question I've also found myself asking... I've got 
a couple custom-built Debian packages that unroll various configurations 
onto VMs, dom0s, and regular machines... I find myself writing in all 
sorts of weird checks to try and determine what it is (and always am 
finding new loopholes that I need to close).
 If there is a nice guaranteed way of detecting a Paravirtualized domU 
(or if the machine is acting as a dom0), I would also be interested in 
knowing (basing it off strings in the kernel name isn't necessarily 100% 
guaranteed).
-Matthew
--
 Matthew Haas
 Visiting Instructor
 Corning Community College
 Computer & Information Science
 http://lab46.corning-cc.edu/haas/home/

  "Writing should be like breathing;
   It is one of those important things we do." -- me

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