Re: [RFC][PATCH] Runtime switching of the idle function [take 2]

[Steven Rostedt <rostedt@goodmis.org>]

On Tue, 2005-11-29 at 15:50 +0100, Andi Kleen wrote:
> On Tue, Nov 29, 2005 at 09:19:31AM -0500, Steven Rostedt wrote:
> > > And in practice the CPU will run so hot that only benchmarkers like it.
> > 
> > Why would it run hot?  What's the difference between polling and doing
> > other things.  How many transistors does it take to poll?
> 
> It will prevent the CPU from going into sleep states and essentially
> keep most of it enabled.  

Well, there's one thing that my patch _does_ help with.  (And it has
just helped me now).  If you boot up with idle=poll and forget about it,
you can check what idle routine is being used and switch out of poll
without rebooting. (like I'm doing right now :-)

-- Steve

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