Re: [PATCH, RFC, tip/core/rcu] v3 scalable classic RCUimplementation

[Peter Zijlstra]

On Fri, 2008-08-29 at 17:49 -0700, Paul E. McKenney wrote:

> Some shortcomings:
> 
> o	Entering and leaving dynticks idle mode is a quiescent state,
> 	but the current patch doesn't take advantage of this (noted
> 	by Manfred).  It appears that it should be possible to make
> 	nmi_enter() and nmi_exit() provide an in_nmi(), which would make
> 	it possible for rcu_irq_enter() and rcu_irq_exit() to figure
> 	out whether it is safe to tell RCU about the quiescent state --
> 	and also greatly simplify the code.

Already done and available in the -tip tree, curtesy of Mathieu.


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