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

Peter Zijlstra
2011-09-02T08:25:41Z

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.