cgd@broadcom.com <cgd@broadcom.com> pointed;

> > 64bit address space would require to traverse traditional-but-very-sparse
> > multiple level PTE tree, probably similar to NetBSD/alpha, to cover its larger
> > address space extent.  
>
> Uh, actually, for TLB refill alpha uses a ... linear mapping in
> virtual memory.  see the stuff about the "VPT" -- virtual page table.

alpha PTE manipulation is done in table-walk for user address space even though
kernel PTE is handsomely thru VPT.

Toru Nishimura