x86: memtest bootparam

[sfrench/cifs-2.6.git] / arch / x86 / Kconfig.debug

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 7ce8e702566182320554e82c52f87d9dfe97bf1a..f4413c04e687c16f0cf15973a4f100d2f62f203c 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -76,6 +76,18 @@ config DEBUG_RODATA
          data. This is recommended so that we can catch kernel bugs sooner.
          If in doubt, say "Y".
 
+config DIRECT_GBPAGES
+       bool "Enable gbpages-mapped kernel pagetables"
+       depends on DEBUG_KERNEL && EXPERIMENTAL && X86_64
+       help
+         Enable gigabyte pages support (if the CPU supports it). This can
+         improve the kernel's performance a tiny bit by reducing TLB
+         pressure.
+
+         This is experimental code.
+
+         If in doubt, say "N".
+
 config DEBUG_RODATA_TEST
        bool "Testcase for the DEBUG_RODATA feature"
        depends on DEBUG_RODATA