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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 18 Nov 2010 21:09:02 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/vm vm_contig.c vm_object.c vm_pageout.c
 vm_pageout.h
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kib         2010-11-18 21:09:02 UTC

  FreeBSD src repository

  Modified files:
    sys/vm               vm_contig.c vm_object.c vm_pageout.c 
                         vm_pageout.h 
  Log:
  SVN rev 215471 on 2010-11-18 21:09:02Z by kib
  
  vm_pageout_flush() might cache the pages that finished write to the
  backing storage. Such pages might be then reused, racing with the
  assert in vm_object_page_collect_flush() that verified that dirty
  pages from the run (most likely, pages with VM_PAGER_AGAIN status) are
  write-protected still. In fact, the page indexes for the pages that
  were removed from the object page list should be ignored by
  vm_object_page_clean().
  
  Return the length of successfully written run from vm_pageout_flush(),
  that is, the count of pages between requested page and first page
  after requested with status VM_PAGER_AGAIN. Supply the requested page
  index in the array to vm_pageout_flush(). Use the returned run length
  to forward the index of next page to clean in vm_object_page_clean().
  
  Reported by:    avg
  Reviewed by:    alc
  MFC after:      1 week
  
  Revision  Changes    Path
  1.84      +1 -1      src/sys/vm/vm_contig.c
  1.428     +2 -23     src/sys/vm/vm_object.c
  1.331     +11 -3     src/sys/vm/vm_pageout.c
  1.46      +1 -1      src/sys/vm/vm_pageout.h