arm64: NUMA: Kconfig: Increase NODES_SHIFT to 4

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. Cherry pick from: torvalds/linux@2a13c13 Signed-off-by: Vanshidhar Konda <[email protected]> Acked-by: Catalin Marinas <[email protected]> Link: https://lore.kernel.org/r/[email protected]/ Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Will Deacon <[email protected]>
AmpereComputing · Feb 1, 2021 · 409b032 · 409b032
1 parent 16ac324
commit 409b032
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
@@ -908,7 +908,7 @@ 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