This is hopefully the last time in a while that
something in the mm subsystem needs a refactor
this large. There are two main changes:
- The page frame allocator returns a vm_page_t
rather than a virtual address.
- Data for the slab allocator is now stored in
struct vm_page, which means there is no overhead
in the slab itself so the space is used in a
more efficient manner.
As of now, everything except the code imported
from FreeBSD is proprietary. Of course, it won't
be like this for long, only until we have decided
which license we like to use. The rationale is
that releasing everything under a copyleft license
later is always easier than doing so immediately
and then changing it afterwards.
Naturally, any changes made before this commit are
still subject to the terms of the CNPL.
