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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