From owner-cvs-all  Wed Apr 26 13:36:42 2000
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From: Matt Dillon <dillon@FreeBSD.org>
Date: Wed, 26 Apr 2000 13:36:37 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/gnu/ext2fs ext2_readwrite.c src/sys/kern
         vfs_cluster.c vfs_vnops.c src/sys/sys buf.h file.h vnode.h
         src/sys/ufs/ufs ufs_readwrite.c
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dillon      2000/04/26 13:36:37 PDT

  Modified files:        (Branch: RELENG_4)
    sys/gnu/ext2fs       ext2_readwrite.c 
    sys/kern             vfs_cluster.c vfs_vnops.c 
    sys/sys              buf.h file.h vnode.h 
    sys/ufs/ufs          ufs_readwrite.c 
  Log:
      MFC sequential write detection heuristic.  This extends the sequential
      read heuristic to also cover sequential writes, causing write-behind
      to be used only for the sequential write case.  This solves a number of
      performance issues with random writes to medium sized files using
      large block sizes, as occurs with DBM files.
  
  Revision  Changes    Path
  1.18.2.1  +4 -2      src/sys/gnu/ext2fs/ext2_readwrite.c
  1.92.2.1  +30 -9     src/sys/kern/vfs_cluster.c
  1.87.2.1  +39 -28    src/sys/kern/vfs_vnops.c
  1.88.2.1  +2 -2      src/sys/sys/buf.h
  1.22.2.1  +3 -3      src/sys/sys/file.h
  1.111.2.1 +3 -2      src/sys/sys/vnode.h
  1.65.2.1  +4 -2      src/sys/ufs/ufs/ufs_readwrite.c



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