x86, mm: enable GBPAGES option by default

[~andy/linux] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5b9b12321ad132ed1987ae7e5a9bdf278cc4be7a..c00aefcb47d55e2f83dcee964b67c6df2b0379b2 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -946,6 +946,15 @@ config X86_PAE
 config ARCH_PHYS_ADDR_T_64BIT
        def_bool X86_64 || X86_PAE
 
+config DIRECT_GBPAGES
+       bool "Enable 1GB pages for kernel pagetables" if EMBEDDED
+       default y
+       depends on X86_64
+       help
+         Allow the kernel linear mapping to use 1GB pages on CPUs that
+         support it. This can improve the kernel's performance a tiny bit by
+         reducing TLB pressure. If in doubt, say "Y".
+
 # Common NUMA Features
 config NUMA
        bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"