> 
> Finally, almost unrelated: if one was to grab, say, 1.5 MB of memory for
> kernel driver using those neato vax_map_physmem functions for vax and
> kernel choked with
> 
> panic: vax_map_physmem: kernel map full
> Stopped in pid 0 (swapper) at   vax_map_physmem+0x32:   pushl  
> r7              
> 
The kernel map is sized before the VM system is initialized (because it
needs contiguous physical memory). You must add an entry for it
in arch/vax/vax/pmap.c:calc_kvmsize() to get enough KVA for your needs.

-- Ragge