Re: [PATCH 2/8] Create the ZONE_MOVABLE zone

On Thu, 25 Jan 2007, Mel Gorman wrote:

> @@ -166,6 +168,8 @@ enum zone_type {
>  #define ZONES_SHIFT 1
>  #elif __ZONE_COUNT <= 4
>  #define ZONES_SHIFT 2
> +#elif __ZONE_COUNT <= 8
> +#define ZONES_SHIFT 3
>  #else

You do not need a shift of 3. Even with ZONE_MOVABLE the maximum 
number of zones is still 4.

x86_64 has DMA, DMA32, NORMAL, MOVABLE
i386 has DMA, NORMAL, HIGHMEM, MOVABLE

x86_64 is the only platform that has DMA32.
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