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arm64: NUMA: Kconfig: Increase NODES_SHIFT to 4

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The current arm64 default config limits max NUMA nodes available on
system to 4 (NODES_SHIFT = 2). Today's arm64 systems can reach or
exceed 16 NUMA nodes. To accomodate current hardware and to fit
NODES_SHIFT within page flags on arm64, increase NODES_SHIFT to 4.

Signed-off-by: Vanshidhar Konda <vanshikonda@os.amperecomputing.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20201020173409.1266576-1-vanshikonda@os.amperecomputing.com/
Link: https://lore.kernel.org/r/20201030173050.1182876-1-vanshikonda@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Vanshidhar Konda 2020-10-30 10:30:50 -07:00 committed by Will Deacon
parent ec9d78070d
commit 2a13c13b39
1 changed files with 1 additions and 1 deletions
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arch/arm64/Kconfig
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@ -1002,7 +1002,7 @@ config NUMA
config NODES_SHIFT
int "Maximum NUMA Nodes (as a power of 2)"
range 1 10
default "2"
default "4"
depends on NEED_MULTIPLE_NODES
help
Specify the maximum number of NUMA Nodes available on the target