Hello,

  Here is a small patch for 2.6.8-rc2 that updates information about 
bytes and blocks read and written. Fields are already in the BSD 
accounting files but they are never updated. The patch is based on the 
CSA accounting patch and it doesn't interfere with Tim Schmielau changes 
(BSD process accounting version 3).

 Modifications are:
    - It adds four counters in the task_struct (chars read, chars
      written, blocks read and blocks written). I think it's interesting to
      separate read and write even if this difference is not made in the
      BSD accounting.

    - Those fields are updated in:
        fs/read_write.c for bytes
                 [in sys_read(), sys_readv(), sys_write() and sys_writev]
        drivers/block/ll_rw_blk.c for blocks
                 [in drive_stat_acct()]

 
Hope This Help
Guillaume