x86-64, NUMA: Implement generic node distance handling

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Node distance either used direct node comparison, ACPI PXM comparison
or ACPI SLIT table lookup.  This patch implements generic node
distance handling.  NUMA init methods can call numa_set_distance() to
set distance between nodes and the common __node_distance()
implementation will report the set distance.

Due to the way NUMA emulation is implemented, the generic node
distance handling is used only when emulation is not used.  Later
patches will update NUMA emulation to use the generic distance
mechanism.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>

...

This commit is contained in:

Tejun Heo 2011-02-16 17:11:09 +01:00

parent 4697bdcc94

commit ac7136b611

5 changed files with 109 additions and 17 deletions

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1

arch/x86/include/asm/acpi.h

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1

arch/x86/include/asm/numa_64.h

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2

arch/x86/include/asm/topology.h

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95

arch/x86/mm/numa_64.c

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27

arch/x86/mm/srat_64.c

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