Re: [PATCH 2/3] mm: page allocator: Calculate a better estimate ofNR_FREE_PAGES when memory is low and kswapd is awake

[Christoph Lameter]

On Fri, 3 Sep 2010, Andrew Morton wrote:

> > percpu counters must always be added up when their value is determined.
>
> Nope.  That's the difference between percpu_counter_read() and
> percpu_counter_sum().

Hmmm... Okay you can fold them therefore. That is analogous to what we do
in the _snapshot function now.
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