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Date: Sat, 12 Apr 1997 18:48:40 -0700 (PDT)
From: John Dyson <dyson>
Message-Id: <199704130148.SAA09397@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/i386/ibcs2 imgact_coff.c src/sys/i386/i386 pmap.c src/sys/i386/linux imgact_linux.c src/sys/kern imgact_aout.c imgact_elf.c imgact_gzip.c kern_exec.c kern_fork.c src/sys/vm pmap.h vm_extern.h vm_glue.c vm_map.c
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dyson       97/04/12 18:48:39

  Modified:    sys/i386/i386  pmap.c
               sys/i386/ibcs2  imgact_coff.c
               sys/i386/linux  imgact_linux.c
               sys/kern  imgact_aout.c imgact_elf.c imgact_gzip.c
                        kern_exec.c  kern_fork.c
               sys/vm    pmap.h vm_extern.h vm_glue.c vm_map.c
  Log:
  Fully implement vfork.  Vfork is now much much faster than even our
  	fork. (On my machine, fork is about 240usecs, vfork is 78usecs.)
  
  Implement rfork(!RFPROC !RFMEM), which allows a thread to divorce its memory
  	from the other threads of a group.
  
  Implement rfork(!RFPROC RFCFDG), which closes all file descriptors, eliminating
  	possible existing shares with other threads/processes.
  
  Implement rfork(!RFPROC RFFDG), which divorces the file descriptors for a
  	thread from the rest of the group.
  
  Fix the case where a thread does an exec.  It is almost nonsense for a thread
  	to modify the other threads address space by an exec, so we
  	now automatically divorce the address space before modifying it.
  
  Revision  Changes    Path
  1.140     +10 -1     src/sys/i386/i386/pmap.c
  1.24      +3 -2      src/sys/i386/ibcs2/imgact_coff.c
  1.22      +3 -2      src/sys/i386/linux/imgact_linux.c
  1.34      +7 -2      src/sys/kern/imgact_aout.c
  1.19      +4 -2      src/sys/kern/imgact_elf.c
  1.29      +4 -2      src/sys/kern/imgact_gzip.c
  1.60      +3 -1      src/sys/kern/kern_exec.c
  1.35      +44 -4     src/sys/kern/kern_fork.c
  1.20      +2 -1      src/sys/vm/pmap.h
  1.34      +3 -1      src/sys/vm/vm_extern.h
  1.63      +7 -5      src/sys/vm/vm_glue.c
  1.76      +53 -1     src/sys/vm/vm_map.c