cvs commit: src/sys/amd64/amd64 pmap.c

[Alan Cox]

alc         2008-06-13 19:33:56 UTC

  FreeBSD src repository

  Modified files:
    sys/amd64/amd64      pmap.c 
  Log:
  SVN rev 179777 on 2008-06-13 19:33:56Z by alc
  
  Tweak the promotion test in pmap_promote_pde().  Specifically, test PG_A
  before PG_M.  This sometimes prevents unnecessary removal of write access
  from a PTE.  Overall, the net result is fewer demotions and promotion
  failures.
  
  Revision  Changes    Path
  1.621     +4 -5      src/sys/amd64/amd64/pmap.c