cvs commit: src/sys/amd64/amd64 pmap.c src/sys/i386/i386 pmap.c

[Alan Cox]

alc         2005-09-04 19:06:27 UTC

  FreeBSD src repository

  Modified files:
    sys/amd64/amd64      pmap.c 
    sys/i386/i386        pmap.c 
  Log:
  Eliminate unnecessary TLB invalidations by pmap_enter().  Specifically,
  eliminate TLB invalidations when permissions are relaxed, such as when a
  read-only mapping is changed to a read/write mapping.  Additionally,
  eliminate TLB invalidations when bits that are ignored by the hardware,
  such as PG_W ("wired mapping"), are changed.
  
  Reviewed by:    tegge
  
  Revision  Changes    Path
  1.528     +22 -16    src/sys/amd64/amd64/pmap.c
  1.532     +23 -16    src/sys/i386/i386/pmap.c