Not enough memory

[hanjar <hanjar%phenix.rootshell.be@localhost>]

Hello,

I've tried to get Xen running on current with PII 266MHz with
64MB RAM. Then I found out that wasn't enough. So I upgraded to 
192MB.

So when I boot the XEN0 kernel now I get an error telling me that
there isn't enough memory available. Similar to this:

http://lists.xensource.com/archives/html/xen-devel/2005-01/msg00617.html

But the thing is, I don't specify all the physical memory available.
I only specify 128MB in grub's menu.lst as dom0_mem=131072.

If I try to put dom0_mem=128M (as opposed to 131072) all I get is 
Xen kernel that partialy tries to boot and then hangs.

This is all on current 3.99 (I'm typing this from a different machine,
I can't recall the exact number).

The xen version is 2.0.5. 

What is the minimum requirement for Xen then ?

Thanks !