Re: + paravirt-vmi-timer-patches.patch added to -mm tree

From: Zachary Amsden
Date: Sat Jan 06 2007 - 15:37:47 EST


Daniel Walker wrote:
On Fri, 2006-12-15 at 14:27 -0800, akpm@xxxxxxxx wrote:
+
+config NO_IDLE_HZ
+ bool
+ depends on PARAVIRT
+ default y
+ help
+ Switches the regular HZ timer off when the system is going
idle.
+ This helps a hypervisor detect that the Linux system is
idle,
+ reducing the overhead of idle systems.


There is already a dynamic tick (NO_HZ) system in the -mm tree .. Given
that this implementation seems unnecessary. Why do you need another
different system to do this?

We don't. This was written before the dynamic tick code, and now they need to be merged. Until then, they can safely coexist.

Zach

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