> Ok, while true, I'm not sure how it affects performance. The only "real"
> value affected by present_pages is the number of patches that are
> allocated in batches to the per-cpu allocator.
It affects the low/high water marks in the VM zone balancer.
Especially for the 16MB DMA zone it can make a difference if you
account 4MB kernel in there or not.
-Andi
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