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SubjectRe: [PATCH 2/8] Create the ZONE_MOVABLE zone
On Fri, 26 Jan 2007, Christoph Lameter wrote:

> 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.
>

Good point. I'll recheck this to be sure but if it's true, it means that
the only major collision point between these patches and the optional
ZONE_DMA patches goes away.

--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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