Re: [ANNOUNCE] 3.8-rc6-nohz4

[Steven Rostedt]

On Thu, 2013-02-07 at 17:25 +0100, Frederic Weisbecker wrote:

> At least for now we seem to agree on CONFIG_NO_HZ_IDLE and keep
> CONFIG_NO_HZ for compatibility. Are you ok with that? If so I'll send
> a patch.

I believe that Ingo was suggesting to have CONFIG_NO_HZ give options to
what type of config NO_HZ you want. Something like:

config NO_HZ
	bool "Enable tickless support"

config NO_HZ_IDLE
	bool "Stop tick when CPU is idle"
	default y
	depends on NO_HZ

config NO_HZ_TASK
	bool "Stop tick on specified CPUs when single task is running"
	default n
	depends on NO_HZ

That is, if you select NO_HZ, by default NO_HZ_IDLE is also selected.
But in the kernel the NO_HZ_IDLE is used.

-- Steve


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