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From: Alan Cox <alc@FreeBSD.org>
Date: Mon, 18 Jun 2007 02:04:39 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Subject: cvs commit: src/sys/vm vm_pageout.c
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alc         2007-06-18 02:04:39 UTC

  FreeBSD src repository

  Modified files:
    sys/vm               vm_pageout.c 
  Log:
  Eliminate unnecessary checks from vm_pageout_clean(): The page that is
  passed to vm_pageout_clean() cannot possibly be PG_UNMANAGED because
  it came from the inactive queue and PG_UNMANAGED pages are not in any
  page queue.  Moreover, PG_UNMANAGED pages only exist in OBJT_PHYS
  objects, and all pages within a OBJT_PHYS object are PG_UNMANAGED.
  So, if the page that is passed to vm_pageout_clean() is not
  PG_UNMANAGED, then it cannot be from an OBJT_PHYS object and its
  neighbors from the same object cannot themselves be PG_UNMANAGED.
  
  Reviewed by:    tegge
  
  Revision  Changes    Path
  1.287     +4 -7      src/sys/vm/vm_pageout.c