mm: sched: numa: Control enabling and disabling of NUMA balancing

This patch adds Kconfig options and kernel parameters to allow the
enabling and disabling of automatic NUMA balancing. The existance
of such a switch was and is very important when debugging problems
related to transparent hugepages and we should have the same for
automatic NUMA placement.

Signed-off-by: Mel Gorman <mgorman@suse.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 9f00f004796a..18e2a5920a34 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -720,6 +720,14 @@ config ARCH_USES_NUMA_PROT_NONE
         depends on ARCH_WANTS_PROT_NUMA_PROT_NONE
         depends on NUMA_BALANCING
 
+config NUMA_BALANCING_DEFAULT_ENABLED
+        bool "Automatically enable NUMA aware memory/task placement"
+        default y
+        depends on NUMA_BALANCING
+        help
+          If set, autonumic NUMA balancing will be enabled if running on a NUMA
+          machine.
+
 config NUMA_BALANCING
         bool "Memory placement aware NUMA scheduler"
         default y