uvm_fault with -current XEN3_DOMU

[Mark Davies <mark%mcs.vuw.ac.nz@localhost>]

Trying to run an i386 XEN3_DOMU kernel from this morning results in an 
immediate uvm_fault:

green-mountain# xm create -c homepages
Using config file "/etc/xen/homepages".
Started domain homepages
 MAC address 00:16:3e:00:00:11
unknown type console at xenbus0 id 0 not configured
uvm_fault(0xc04b1d00, 0, 1) -> 0xe
kernel: supervisor trap page fault, code=0
Stopped in pid 0.2 (system) at  0:      invalid address
db> bt
uvm_fault(0xc04b1d00, 0, 1) -> 0xe
kernel: supervisor trap page fault, code=0
Faulted in DDB; continuing...
db> 

This was previously working fine with 4.99.60 XEN3_DOMU kernel (except 
that it would panic every time amd tried to unmount an NFS 
filesystem - hence the desire for the update)

cheers
mark