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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Wed, 29 Dec 2010 12:53:53 +0000 (UTC)
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Subject: cvs commit: src/sys/vm vm_object.c vm_page.c
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kib         2010-12-29 12:53:53 UTC

  FreeBSD src repository

  Modified files:
    sys/vm               vm_object.c vm_page.c 
  Log:
  SVN rev 216799 on 2010-12-29 12:53:53Z by kib
  
  Move the increment of vm object generation count into
  vm_object_set_writeable_dirty().
  
  Fix an issue where restart of the scan in vm_object_page_clean() did
  not removed write permissions for newly added pages or, if the mapping
  for some already scanned page changed to writeable due to fault.
  Merge the two loops in vm_object_page_clean(), doing the remove of
  write permission and cleaning in the same loop. The restart of the
  loop then correctly downgrade writeable mappings.
  
  Fix an issue where a second caller to msync() might actually return
  before the first caller had actually completed flushing the
  pages. Clear the OBJ_MIGHTBEDIRTY flag after the cleaning loop, not
  before.
  
  Calls to pmap_is_modified() are not needed after pmap_remove_write()
  there.
  
  Proposed, reviewed and tested by:       alc
  MFC after:      1 week
  
  Revision  Changes    Path
  1.434     +34 -31    src/sys/vm/vm_object.c
  1.430     +0 -1      src/sys/vm/vm_page.c