OS-881 To workaround OS-580 add support to only invalidate mappings from a single process

*** 19,28 ****
--- 19,29 ----
   * CDDL HEADER END
   */
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright 2012 Joyent, Inc.  All rights reserved.
   */
  
  #pragma ident   "%Z%%M% %I%     %E% SMI"
  
  #include <sys/mman.h>
*** 549,559 ****
          if (end <= start)
                  return (0);
  
          errno = 0;
          res = pr_memcntl(Pr, start, (end - start), MC_SYNC,
!             (caddr_t)(MS_ASYNC | MS_INVALIDATE), 0, 0);
          debug_high("pr_memcntl [%p-%p): %d", (void *)start, (void *)end, res);
  
          /*
           * EBUSY indicates none of the pages have backing store allocated, or
           * some pages were locked, which are less interesting than other
--- 550,560 ----
          if (end <= start)
                  return (0);
  
          errno = 0;
          res = pr_memcntl(Pr, start, (end - start), MC_SYNC,
!             (caddr_t)(MS_ASYNC | MS_INVALCURPROC), 0, 0);
          debug_high("pr_memcntl [%p-%p): %d", (void *)start, (void *)end, res);
  
          /*
           * EBUSY indicates none of the pages have backing store allocated, or
           * some pages were locked, which are less interesting than other