cvs commit: src/sys/kern kern_exit.c src/sys/vm vm_extern.h vm_glue.c vm_map.c vm_map.h vm_meter.c

[Tor Egge]

tegge       2006-05-29 21:28:56 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_exit.c 
    sys/vm               vm_extern.h vm_glue.c vm_map.c vm_map.h 
                         vm_meter.c 
  Log:
  Close race between vmspace_exitfree() and exit1() and races between
  vmspace_exitfree() and vmspace_free() which could result in the same
  vmspace being freed twice.
  
  Factor out part of exit1() into new function vmspace_exit().  Attach
  to vmspace0 to allow old vmspace to be freed earlier.
  
  Add new function, vmspace_acquire_ref(), for obtaining a vmspace
  reference for a vmspace belonging to another process.  Avoid changing
  vmspace refcount from 0 to 1 since that could also lead to the same
  vmspace being freed twice.
  
  Change vmtotal() and swapout_procs() to use vmspace_acquire_ref().
  
  Reviewed by:    alc
  
  Revision  Changes    Path
  1.289     +2 -29     src/sys/kern/kern_exit.c
  1.78      +2 -0      src/sys/vm/vm_extern.h
  1.215     +3 -6      src/sys/vm/vm_glue.c
  1.374     +91 -16    src/sys/vm/vm_map.c
  1.119     +0 -1      src/sys/vm/vm_map.h
  1.86      +6 -1      src/sys/vm/vm_meter.c