• Alan Cox's avatar
    Add the superpage reservation system. This is "part 2 of 2" of the · f8a47341
    Alan Cox authored
    machine-independent support for superpages.  (The earlier part was
    the rewrite of the physical memory allocator.)  The remainder of the
    code required for superpages support is machine-dependent and will
    be added to the various pmap implementations at a later date.
    Initially, I am only supporting one large page size per architecture.
    Moreover, I am only enabling the reservation system on amd64.  (In
    an emergency, it can be disabled by setting VM_NRESERVLEVELS to 0
    in amd64/include/vmparam.h or your kernel configuration file.)