Re: [PATCH tip/core/rcu 02/11] rcu: Expedite during suspend andresume only on smallish systems

[Josh Triplett]

On Sat, Aug 17, 2013 at 06:37:47PM -0700, Paul E. McKenney wrote:
> From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
> 
> Expedited grace periods are of dubious benefit on very large systems,
> so this commit restricts their automated use during suspend and resume
> to systems of 256 or fewer CPUs.
> 
> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>

This seems odd.  If expedited grace periods don't help on large systems,
shouldn't you just compile them out entirely and ignore rcu_expedited,
rather than just in this one special case?

In any case, if this patch still makes sense, please squash it into the
previous one.

- Josh Triplett
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