K 10
svn:author
V 8
jmallett
K 8
svn:date
V 27
2010-04-03T03:31:14.417126Z
K 7
svn:log
V 801
Checkpoint a WIP...
o) Move to 8K pages from 4K pages and use a single PTE to populate TLBLo0 and
   TLBLo1, with the PFN adjusted appropriately in TLBLo1.
o) Keep the same kstack and uarea size (8K) and move to using a single page for
   both.

   Note that we can remove the awkward (and broken) allocation of 3 pages to
   get a kstack and the subsequent modification to ensure that the kstack would
   not have to share its TLB entry and would fit into a single TLB entry.

   This means we can also remove mdthread's realstack.
o) Likewise remove similar balancing acts in fpage allocation.
o) Don't use pmap_update_page in pmap_kenter, use pmap_invalidate_page.  We do
   a lot of pmap_kenter calls in a row at early startup in particular and it
   doesn't make sense to keep thrashing the TLB.

END