----- Original Message -----
> Hello Dave,
>
> The attachment is the code that adds two command, rbtree and rdtree.  The
> commands work well, but, onsidering some code is a copy of command list,
> I think the code still need a big change.
>
 Hi Qiao,
 I haven't been able to spend much time looking at this patch, but
 these are my initial impressions.
 My suggestion of a single "tree" command was just that, where there
 would be a single "tree" command, and that command would require an
 option to make the differentiation between an red-black tree and a
 radix tree.
 I don't quite understand why you *only* have the "[-o] offset" advertised
 for the rbtree command?  Virtually every instance of a radix_tree_root
 structure in the kernel is embedded in a data structure, similar to the
 typical usage of an rb_root.  Why the difference?
 The "-H start" option should probably be something like "-R" for
"root".
 When -H is used in the list command, it refers to list_[H]ead.
 The examples in the help pages are not particularly helpful.
 I don't know what "tts.rb" refers to?  Can you find better examples
 that the user can relate to?
 Also, a clear explanation of what the "position information" actually
 means would be helpful.
 Thanks,
    Dave
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