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| author | Ravikiran Thirumalai <kiran@scalex86.org> | 2006-01-11 21:45:36 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-12 03:04:59 (GMT) |
| commit | 05b3cbd8bb98736387df8a2e1efe311b1fb4d2ad (patch) | |
| tree | 46ca01cfe38d2df4c6f93ba0325a3f2a1e97ea71 /include/asm-x86_64/numa.h | |
| parent | 0b91317e338f42367de6d53f5e14f273aae7d034 (diff) | |
| download | linux-05b3cbd8bb98736387df8a2e1efe311b1fb4d2ad.tar.xz | |
[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/numa.h')
| -rw-r--r-- | include/asm-x86_64/numa.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-x86_64/numa.h b/include/asm-x86_64/numa.h index d51e56f..34e434c 100644 --- a/include/asm-x86_64/numa.h +++ b/include/asm-x86_64/numa.h @@ -20,6 +20,11 @@ extern int numa_off; extern void numa_set_node(int cpu, int node); extern unsigned char apicid_to_node[256]; +#ifdef CONFIG_NUMA +extern void __init init_cpu_to_node(void); +#else +#define init_cpu_to_node() do {} while (0) +#endif #define NUMA_NO_NODE 0xff |