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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