Re: [ANNOUNCE] Full dynticks selftests 0.0.1

From: Christoph Lameter
Date: Wed Jun 19 2013 - 10:30:59 EST

On Tue, 18 Jun 2013, Paul E. McKenney wrote:

> +online to handle timekeeping tasks in order to ensure that system
> +calls like gettimeofday() returns accurate values on adaptive-tick CPUs.
> +(This is not an issue for CONFIG_NO_HZ_IDLE=y because there are no running
> +user processes to observe slight drifts in clock rate.) Therefore, the
> +boot CPU is prohibited from entering adaptive-ticks mode. Specifying a
> +"nohz_full=" mask that includes the boot CPU will result in a boot-time
> +error message, and the boot CPU will be removed from the mask. Note that
> +this means that your system must have at least two CPUs in order for
> +CONFIG_NO_HZ_FULL=y to do anything for you.

These are some important point here. Very good. Thanks.

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