cvs commit: src/sys/alpha/alpha pmap.c src/sys/amd64/amd64 pmap.c src/sys/i386/i386 pmap.c src/sys/ia64/ia64 pmap.c src/sys/sparc64/sparc64 pmap.c src/sys/vm pmap.h

[Alan Cox]

alc         2003/09/07 19:45:03 PDT

  FreeBSD src repository

  Modified files:
    sys/alpha/alpha      pmap.c 
    sys/amd64/amd64      pmap.c 
    sys/i386/i386        pmap.c 
    sys/ia64/ia64        pmap.c 
    sys/sparc64/sparc64  pmap.c 
    sys/vm               pmap.h 
  Log:
  Introduce a new pmap function, pmap_extract_and_hold().  This function
  atomically extracts and holds the physical page that is associated with the
  given pmap and virtual address.  Such a function is needed to make the
  memory mapping optimizations used by, for example, pipes and raw disk I/O
  MP-safe.
  
  Reviewed by:    tegge
  
  Revision  Changes    Path
  1.137     +23 -0     src/sys/alpha/alpha/pmap.c
  1.435     +24 -0     src/sys/amd64/amd64/pmap.c
  1.431     +24 -0     src/sys/i386/i386/pmap.c
  1.120     +24 -0     src/sys/ia64/ia64/pmap.c
  1.122     +22 -0     src/sys/sparc64/sparc64/pmap.c
  1.62      +1 -0      src/sys/vm/pmap.h