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authorRavikiran Thirumalai <kiran@scalex86.org>2006-01-11 16:45:36 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-11 22:04:59 -0500
commit05b3cbd8bb98736387df8a2e1efe311b1fb4d2ad (patch)
tree46ca01cfe38d2df4c6f93ba0325a3f2a1e97ea71 /include/asm-x86_64
parent0b91317e338f42367de6d53f5e14f273aae7d034 (diff)
[PATCH] x86_64: Early initialization of cpu_to_node
Patch enables early intialization of cpu_to_node. apicid_to_node is built by reading the SRAT table, from acpi_numa_init with ACPI_NUMA and k8_scan_nodes with K8_NUMA. x86_cpu_to_apicid is built by parsing the ACPI MADT table, from acpi_boot_init. We combine these two tables and setup cpu_to_node. Early intialization helps the static per_cpu_areas in getting pages from correct node. Change since last release: Do not initialize early init_cpu_to_node for faking node cases. Patch tested on TYAN dual core 4P board with K8 only, ACPI_NUMA. Tested on EM64T NUMA. Also tested with numa=off, numa=fake, and running a kernel compiled with NUMA on a regular EM64 2 way SMP. Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/numa.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-x86_64/numa.h b/include/asm-x86_64/numa.h
index d51e56fdc3da..34e434ce3268 100644
--- a/include/asm-x86_64/numa.h
+++ b/include/asm-x86_64/numa.h
@@ -20,6 +20,11 @@ extern int numa_off;
20extern void numa_set_node(int cpu, int node); 20extern void numa_set_node(int cpu, int node);
21 21
22extern unsigned char apicid_to_node[256]; 22extern unsigned char apicid_to_node[256];
23#ifdef CONFIG_NUMA
24extern void __init init_cpu_to_node(void);
25#else
26#define init_cpu_to_node() do {} while (0)
27#endif
23 28
24#define NUMA_NO_NODE 0xff 29#define NUMA_NO_NODE 0xff
25 30