Re: [PATCH tip/core/rcu] Do not keep timekeeping CPU tick running for non-nohz_full= CPUs

[Mike Galbraith]

On Wed, 2014-07-23 at 18:02 +0200, Frederic Weisbecker wrote:

> Yes. Distros seem to want to make full dynticks available for users but they
> also want the off case (when nohz_full= isn't passed) to keep the lowest overhead
> as possible.

Yup, zero being the _desired_ number.  The general case can't afford any
fastpath cycles being added by a fringe feature, we're too fat now.

Imagines marketeer highlighting shiny new fringe feature: "...and most
network benchmarks show that we only lost a few percent throughput, so
you won't have to increase the size of your server farm _too_ much".

Ok, so my imagination conjured up a _stupid_ marketeer, you get it ;-)

-Mike

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