Quick question from a french student...

I would like to use UVM to allocate large memory in kernel land.
I used uao_create, round_page, uvm_map to allocate virtual space.
But now I would like to write and read inside those pages still being 
in kernel land.
When I tried with copyout to write buffer inside it I got a page 
fault...

I learnt from der Mouse that at this step no backend physical pages are 
created in relation to my virtual space,
how do I have to force a page creation?

Is it the right way to use UVM like that concerning what I would like 
to do?

Thank you very much in advance.
Eric.