Re: [PATCH 14/43] mm: mempolicy: Use _PAGE_NUMA to migrate pages

[Rik van Riel]

On 11/16/2012 06:22 AM, Mel Gorman wrote:
> Note: Based on "mm/mpol: Use special PROT_NONE to migrate pages" but
> 	sufficiently different that the signed-off-bys were dropped
>
> Combine our previous _PAGE_NUMA, mpol_misplaced and migrate_misplaced_page()
> pieces into an effective migrate on fault scheme.
>
> Note that (on x86) we rely on PROT_NONE pages being !present and avoid
> the TLB flush from try_to_unmap(TTU_MIGRATION). This greatly improves the
> page-migration performance.
>
> Based-on-work-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

(this is getting easier, I must have reviewed this code 4x now)

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