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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