Re: [tip:timers/nohz] nohz: Move full nohz kick to its own IPI

[Peter Zijlstra]

On Mon, May 05, 2014 at 04:52:59PM +0200, Frederic Weisbecker wrote:
> > Should we instead do irq_work_queue_on() ?
> 
> I would really much prefer that yeah. But if we do that, expect some added overhead on the local
> irq_work_queue() path though. irq_work_raise can't use local cmpxchg ops anymore.
> 
> Or we can have a different pending raise system for remote irq work.
> 
> I can try something.

Loosing that local cmpxchg shouldn't be a problem, I don't  thnk this is
a particularly hot path.
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