Commit d4761ad2 authored Jul 24, 2011 by Anton Blanchard Committed by Benjamin Herrenschmidt Sep 20, 2011

powerpc/numa: Increase SD_NODES_PER_DOMAIN to 32.



The largest POWER7 boxes have 32 nodes. SD_NODES_PER_DOMAIN groups
nodes into chunks of 16 and adds a global balancing domain
(SD_ALLNODES) above it.

If we bump SD_NODES_PER_DOMAIN to 32, then we avoid this extra
level of balancing on our largest boxes.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent 590e4d85

arch/powerpc/include/asm/topology.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -28,6 +28,12 @@ struct device_node;
		*/
		#define RECLAIM_DISTANCE 10

		/*
		* Avoid creating an extra level of balancing (SD_ALLNODES) on the largest
		* POWER7 boxes which have a maximum of 32 nodes.
		*/
		#define SD_NODES_PER_DOMAIN 32

		#include <asm/mmzone.h>

		static inline int cpu_to_node(int cpu)