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| author | Andi Kleen <ak@suse.de> | 2005-11-05 17:25:53 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-14 19:55:14 -0800 |
| commit | 69d81fcde7797342417591ba7affb372b9c86eae (patch) | |
| tree | 97fbc73fd20f8ebc313b2bc41367a8efe36c2c3d /include/asm-x86_64/topology.h | |
| parent | 50895c5d76e15d8af480eff1aaab5770cabbc2c2 (diff) | |
| download | lwn-69d81fcde7797342417591ba7affb372b9c86eae.tar.gz lwn-69d81fcde7797342417591ba7affb372b9c86eae.zip | |
[PATCH] x86_64: Speed up numa_node_id by putting it directly into the PDA
Not go from the CPU number to an mapping array.
Mode number is often used now in fast paths.
This also adds a generic numa_node_id to all the topology includes
Suggested by Eric Dumazet
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/topology.h')
| -rw-r--r-- | include/asm-x86_64/topology.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86_64/topology.h b/include/asm-x86_64/topology.h index 1c603cd7e4d0..d39ebd5263ed 100644 --- a/include/asm-x86_64/topology.h +++ b/include/asm-x86_64/topology.h @@ -28,6 +28,8 @@ extern int __node_distance(int, int); #define pcibus_to_node(bus) ((long)(bus->sysdata)) #define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus)); +#define numa_node_id() read_pda(nodenumber) + /* sched_domains SD_NODE_INIT for x86_64 machines */ #define SD_NODE_INIT (struct sched_domain) { \ .span = CPU_MASK_NONE, \ |