x86: limit scan to 1k of EBDA.

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

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index fa555148823de98079ced8464fb31a28c25c4063..f4413c04e687c16f0cf15973a4f100d2f62f203c 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -34,13 +34,9 @@ config DEBUG_STACK_USAGE
 
          This option will slow down process creation somewhat.
 
-comment "Page alloc debug is incompatible with Software Suspend on i386"
-       depends on DEBUG_KERNEL && HIBERNATION
-       depends on X86_32
-
 config DEBUG_PAGEALLOC
        bool "Debug page memory allocations"
-       depends on DEBUG_KERNEL && X86_32
+       depends on DEBUG_KERNEL
        help
          Unmap pages from the kernel linear mapping after free_pages().
          This results in a large slowdown, but helps to find certain types
@@ -58,6 +54,18 @@ config DEBUG_PER_CPU_MAPS
 
          Say N if unsure.
 
+config X86_PTDUMP
+       bool "Export kernel pagetable layout to userspace via debugfs"
+       depends on DEBUG_KERNEL
+       select DEBUG_FS
+       help
+         Say Y here if you want to show the kernel pagetable layout in a
+         debugfs file. This information is only useful for kernel developers
+         who are working in architecture specific areas of the kernel.
+         It is probably not a good idea to enable this feature in a production
+         kernel.
+         If in doubt, say "N"
+
 config DEBUG_RODATA
        bool "Write protect kernel read-only data structures"
        default y
@@ -68,6 +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
@@ -160,7 +180,7 @@ config IO_DELAY_TYPE_NONE
 
 choice
        prompt "IO delay type"
-       default IO_DELAY_0XED
+       default IO_DELAY_0X80
 
 config IO_DELAY_0X80
        bool "port 0x80 based port-IO delay [recommended]"