Messages in this thread Patch in this message | | | Date | Wed, 22 Oct 2008 12:33:16 +0200 | From | Nick Piggin <> | Subject | [patch] x86: enable GBPAGES option by default |
| |
DIRECT_GBPAGES was under DEBUG_KERNEL && EXPERIMENTAL and disabled by default. Turn it on by default and put it under EMBEDDED.
Signed-off-by: Nick Piggin <npiggin@suse.de> --- Index: linux-2.6/arch/x86/Kconfig =================================================================== --- linux-2.6.orig/arch/x86/Kconfig +++ linux-2.6/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)" Index: linux-2.6/arch/x86/Kconfig.debug =================================================================== --- linux-2.6.orig/arch/x86/Kconfig.debug +++ linux-2.6/arch/x86/Kconfig.debug @@ -114,18 +114,6 @@ 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
| |