Re: [PATCH] mm: introduce numa_zero_pfn

[Kirill A. Shutemov]

On Thu, Dec 13, 2012 at 02:03:39AM +0900, Joonsoo Kim wrote:
> Currently, we use just *one* zero page regardless of user process' node.
> When user process read zero page, at first, cpu should load this
> to cpu cache. If node of cpu is not same as node of zero page, loading
> takes long time. If we make zero pages for each nodes and use them
> adequetly, we can reduce this overhead.
> 
> This patch implement basic infrastructure for numa_zero_pfn.
> It is default disabled, because it doesn't provide page coloring and
> some architecture use page coloring for zero page.

Do you have benchmark numbers?

-- 
 Kirill A. Shutemov

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