Re: [PATCH] percpu: preemptless __per_cpu_counter_add

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On Fri, 29 Apr 2011, Tejun Heo wrote:

> > If someone wants more accuracy then we need the ability to dynamically set
> > the batch limit similar to what the vm statistics do.
>
> So, if you can remove _sum() by doing the above without introducing
> excessive complexity or penalizing use cases which might not have too
> much commonality with vmstat, by all means, but please pay attention
> to the current users.  Actually take a look at them.

I am content to be maintaining the vm statistics.... But Shaohua may want
to have a look at it?

> Also, if someone is gonna put considerable amount of effort into it,
> please also invest some time into showing actual performance benefits,
> or at least possibility of actual benefits.

Yes. I think Shaohua already has some tests that could use some
improving. So we have kind of an agreement on how to move forward?

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