diff options
| author | Anton Blanchard <anton@samba.org> | 2011-07-24 18:33:14 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-20 07:53:22 +0200 |
| commit | d4761ad2ef18ec2c9a0037d6649c0afc4a7b907d (patch) | |
| tree | 508fc064de4a624fe411a6d798c5e74d7b94e433 /arch/powerpc/include/asm/topology.h | |
| parent | sched: Allow SD_NODES_PER_DOMAIN to be overridden (diff) | |
| download | linux-d4761ad2ef18ec2c9a0037d6649c0afc4a7b907d.tar.xz linux-d4761ad2ef18ec2c9a0037d6649c0afc4a7b907d.zip | |
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>
Diffstat (limited to 'arch/powerpc/include/asm/topology.h')
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index 6a7e7251cc02..d1c1d312f808 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -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) |