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Date: Tue, 21 Apr 2009 13:00:30 +0100
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From: roger peppe <rogpeppe@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] Plan9 - the next 20 years
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i wrote:
> the currently rather complex definition of Twalk could
> be replaced by clone and walk1 instead, as
> in the original 9p: {Tclone, Twalk, Twalk, ...}

i've just realised that the replacement would be
somewhat less efficient as the current Twalk, as the
cloned fid would still have to be clunked on a failed
walk. this is a common case when using paths
that traverse a mount point, but perhaps it's less
common that directories are mounted on external filesystems,
and hence not such an important issue (he says,
rationalising hastily :-) )