[PATCH 2/3] arm64: select CPUMASK_OFFSTACK if NUMA
From: Andrea Arcangeli
Date: Sun Feb 23 2020 - 14:25:36 EST
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 <aarcange@xxxxxxxxxx>
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0b30e884e088..882887e65394 100644
@@ -955,6 +955,7 @@ config NUMA
bool "Numa Memory Allocation and Scheduler Support"
select ACPI_NUMA if ACPI
+ select CPUMASK_OFFSTACK
Enable NUMA (Non Uniform Memory Access) support.