[PATCH 37/39] autonuma: add CONFIG_AUTONUMA and CONFIG_AUTONUMA_DEFAULT_ENABLED

[Andrea Arcangeli]

Add the config options to allow building the kernel with AutoNUMA.

If CONFIG_AUTONUMA_DEFAULT_ENABLED is "=y", then
/sys/kernel/mm/autonuma/enabled will be equal to 1, and AutoNUMA will
be enabled automatically at boot.

CONFIG_AUTONUMA currently depends on X86, because no other arch
implements the pte/pmd_numa yet and selecting =y would result in a
failed build, but this shall be relaxed in the future. Porting
AutoNUMA to other archs should be pretty simple.

Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
---
 mm/Kconfig |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index e338407..cbfdb15 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -207,6 +207,19 @@ config MIGRATION
 	  pages as migration can relocate pages to satisfy a huge page
 	  allocation instead of reclaiming.
 
+config AUTONUMA
+	bool "Auto NUMA"
+	select MIGRATION
+	depends on NUMA && X86
+	help
+	  Automatic NUMA CPU scheduling and memory migration.
+
+config AUTONUMA_DEFAULT_ENABLED
+	bool "Auto NUMA default enabled"
+	depends on AUTONUMA
+	help
+	  Automatic NUMA CPU scheduling and memory migration enabled at boot.
+
 config PHYS_ADDR_T_64BIT
 	def_bool 64BIT || ARCH_PHYS_ADDR_T_64BIT
 
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