This patch addresses:

 - a potential data inconsistency that can occur when a CFS
   client reads a file that was recently written to.
   Stale data can be returned to the client.

 - multi-volume AdvFS v3 domains exhibit EIO errors (not 
   attributable to hardware).

   For example, if a second volume is added to an existing 
   domain and the first volume then becomes 100% full, every 
   other file or directory creation will fail from then on.
   For example:
       # cp /vmunix /test/file1
       cp: /test/file1: I/O error
       # mkdir teste5
       # mkdir teste6
       mkdir: cannot create teste6.
       teste6: I/O error