Re: [PATCH] proc: change proc_subdir_lock to a rwlock

[Eric W. Biederman]

Two quick questions.

- What motivates this work?  Are you seeing lots of
  parallel reads on proc?

- Why not rcu?  Additions and removal of proc generic
  files is very rare.  Conversion to rcu for reads should
  perform better and not take much more work.

Eric

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