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From: Max Laier <mlaier@FreeBSD.org>
Date: Thu, 9 Dec 2010 21:02:22 +0000 (UTC)
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Subject: cvs commit: src/sys/vm vm_map.c vm_map.h
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mlaier      2010-12-09 21:02:22 UTC

  FreeBSD src repository

  Modified files:
    sys/vm               vm_map.c vm_map.h 
  Log:
  SVN rev 216335 on 2010-12-09 21:02:22Z by mlaier
  
  Fix a long standing (from the original 4.4BSD lite sources) race between
  vmspace_fork and vm_map_wire that would lead to "vm_fault_copy_wired: page
  missing" panics.  While faulting in pages for a map entry that is being
  wired down, mark the containing map as busy.  In vmspace_fork wait until the
  map is unbusy, before we try to copy the entries.
  
  Reviewed by:    kib
  MFC after:      5 days
  Sponsored by:   Isilon Systems, Inc.
  
  Revision  Changes    Path
  1.439     +41 -1     src/sys/vm/vm_map.c
  1.139     +5 -0      src/sys/vm/vm_map.h