Re: [PATCH documentation 1/2] nohz1: Add documentation.

[Kevin Hilman]

"Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx> writes:

> +KNOWN ISSUES

[...]

> +o	Unless all CPUs are idle, at least one CPU must keep the
> +	scheduling-clock interrupt going in order to support accurate
> +	timekeeping.

At least with the implementation I'm using (Frederic's 3.9-nohz1
branch), at least one CPU is forced to stay out of dyntick-idle
*always*, even if all CPUs are idle.

IMO, this is important to list as a known issue since this will have
its own power implications when the system is mostly idle.

Otherwise, document looks great.  

Reviewed-by: Kevin Hilman <khilman@xxxxxxxxxx>

Kevin

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