From: Ingo Molnar <mingo@elte.hu>
Date: Sun, 4 May 2008 01:38:25 +0200

quoted text
> ah, good! It really looks like unnecessary overhead for the "simple 
> IPIs". But ... i'm wondering ... what about softirq processing? Do these 
> IPIs process softirqs on the way out? In that case the non-processed 
> jiffies might be a problem.
> 
> it's all a bit messy. I wish we could start turning jiffies into a 
> function (which would just read GTOD and estimate jiffies from there), 
> but i fear we are not there yet ...

I think Peter Z. made a good point that we probably need to
keep it there for smp_call_function() receivers, so that
the called functions can test the context they are in accurately.
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