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Subject[PATCH 2/3] arm64: select CPUMASK_OFFSTACK if NUMA
It's unclear why normally CPUMASK_OFFSTACK can only be manually
configured "if DEBUG_PER_CPU_MAPS" which is not an option meant to be
enabled on enterprise arm64 kernels.

The default enterprise kernels NR_CPUS is 4096 which is fairly large.
So it'll save some RAM and it'll increase reliability to select
CPUMASK_OFFSET at least when NUMA is selected and a large NR_CPUS is
to be expected.

Signed-off-by: Andrea Arcangeli <>
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0b30e884e088..882887e65394 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -955,6 +955,7 @@ config NUMA
bool "Numa Memory Allocation and Scheduler Support"
select ACPI_NUMA if ACPI
select OF_NUMA
Enable NUMA (Non Uniform Memory Access) support.

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