TODO revision 1.1 
1- File meta-data is stored using memory pools.  These use, at the moment,
2  wired kernel memory, which is not acceptable because it is easy to turn
3  the system unstable by exhausting it.  Therefore, a pool allocator that
4  uses anonymous memory has to be written.
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6- Optimize for speed and memory usage.  Nodes are still quite big; their
7  size should be reduced if possible.  But most importantly, the algorithm
8  used to resize anonoymous memory objects in regular files is extremely
9  inefficient.
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11- Verify that file holes work (they should, but must be checked).  Add a
12  regression test for this feature.
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14- NFS support is broken.  The readdir operation does not work until wcc is
15  disabled (which happens as soon as doing a `touch foo' over the NFS
16  mount point.  Furthermore, the system crashes if a file is created on the
17  original file system and is read through NFS; the system spits a panic
18  about busy pages.
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20- Fix and complete code marked with `XXX' and `TODO' tags.
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