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From: Alan Cox <alc@FreeBSD.org>
Date: Sat, 27 Jun 2009 21:37:36 +0000 (UTC)
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Subject: cvs commit: src/sys/kern vfs_cluster.c
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alc         2009-06-27 21:37:36 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             vfs_cluster.c 
  Log:
  SVN rev 195122 on 2009-06-27 21:37:36Z by alc
  
  Correct a long-standing performance bug in cluster_rbuild().  Specifically,
  in the case of a file system with a block size that is less than the page
  size, cluster_rbuild() looks at too many of the page's valid bits.
  Consequently, it may terminate prematurely, resulting in poor performance.
  
  Reported by:    bde
  Reviewed by:    tegge
  Approved by:    re (kib)
  
  Revision  Changes    Path
  1.179     +15 -4     src/sys/kern/vfs_cluster.c