X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=arch%2Fi386%2FKconfig.debug;h=c92191b1fb672935527bccbadfdd129065306edb;hb=63518472c05a351d779f35803e6ccfb361ae630a;hp=c48b424dd6401de05d5c8d3ecbbf661e15f0a78f;hpb=3133c5e896c0b2509e72ae0c2cb9452c80d47f46;p=powerpc.git

diff --git a/arch/i386/Kconfig.debug b/arch/i386/Kconfig.debug
index c48b424dd6..c92191b1fb 100644
--- a/arch/i386/Kconfig.debug
+++ b/arch/i386/Kconfig.debug
@@ -31,17 +31,36 @@ config DEBUG_STACK_USAGE
 
 	  This option will slow down process creation somewhat.
 
+config STACK_BACKTRACE_COLS
+	int "Stack backtraces per line" if DEBUG_KERNEL
+	range 1 3
+	default 2
+	help
+	  Selects how many stack backtrace entries per line to display.
+
+	  This can save screen space when displaying traces.
+
 comment "Page alloc debug is incompatible with Software Suspend on i386"
 	depends on DEBUG_KERNEL && SOFTWARE_SUSPEND
 
 config DEBUG_PAGEALLOC
-	bool "Page alloc debugging"
-	depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND
+	bool "Debug page memory allocations"
+	depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND && !HUGETLBFS
 	help
 	  Unmap pages from the kernel linear mapping after free_pages().
 	  This results in a large slowdown, but helps to find certain types
 	  of memory corruptions.
 
+config DEBUG_RODATA
+	bool "Write protect kernel read-only data structures"
+	depends on DEBUG_KERNEL
+	help
+	  Mark the kernel read-only data as write-protected in the pagetables,
+	  in order to catch accidental (and incorrect) writes to such const
+	  data. This option may have a slight performance impact because a
+	  portion of the kernel code won't be covered by a 2MB TLB anymore.
+	  If in doubt, say "N".
+
 config 4KSTACKS
 	bool "Use 4Kb for kernel stacks instead of 8Kb"
 	depends on DEBUG_KERNEL
@@ -62,4 +81,13 @@ config X86_MPPARSE
 	depends on X86_LOCAL_APIC && !X86_VISWS
 	default y
 
+config DOUBLEFAULT
+	default y
+	bool "Enable doublefault exception handler" if EMBEDDED
+	help
+          This option allows trapping of rare doublefault exceptions that
+          would otherwise cause a system to silently reboot. Disabling this
+          option saves about 4k and might cause you much additional grey
+          hair.
+
 endmenu