Re: [PATCH 05/32] nohz: Move rcu dynticks idle mode handling toidle enter/exit APIs

[Peter Zijlstra]

On Thu, 2011-09-01 at 18:41 -0700, Paul E. McKenney wrote:
> > Now we could possibly add magic to rcu_read_unlock_special() to restart
> > the tick in that case.
> 
> Not from NMI handlers we can't.  Unless I am really confused about the
> code that restarts the tick.  Which is not impossible, but ... 

Uhm.. good point ;-) yes that will be somewhat detrimental to the
overall OS health if we attempt such a thing.
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