[PATCH 2/3] arm64: select CPUMASK_OFFSTACK if NUMA

Andrea Arcangeli
2020-02-23T19:25:35Z

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@redhat.com>
---
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
+ select CPUMASK_OFFSTACK
help
Enable NUMA (Non Uniform Memory Access) support.