matthew green wrote:

>
>    At some point someone decided to use extent maps to keep track of swap
>    space.
>
> FWIW, this change occured when i rewrote vm_swap.c, well before even UVM.

Perhaps something in UVM or UBC has made the swap space more fragmented
so that teh extent map has more things in it now?  I didn't note the problem
until recently.

    -- Lennart