X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fi386%2FKconfig.debug;h=b7dc11db34790f648d31197b1d646787b9af38e3;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=ffb6642256d929c1d057dbc1f846cbc1bcfacfa2;hpb=6a77f38946aaee1cd85eeec6cf4229b204c15071;p=linux-2.6.git

diff --git a/arch/i386/Kconfig.debug b/arch/i386/Kconfig.debug
index ffb664225..b7dc11db3 100644
--- a/arch/i386/Kconfig.debug
+++ b/arch/i386/Kconfig.debug
@@ -1,9 +1,13 @@
 menu "Kernel hacking"
 
+config TRACE_IRQFLAGS_SUPPORT
+	bool
+	default y
+
 source "lib/Kconfig.debug"
 
 config EARLY_PRINTK
-	bool "Early printk" if EMBEDDED
+	bool "Early printk" if EMBEDDED && DEBUG_KERNEL
 	default y
 	help
 	  Write kernel log output directly into the VGA buffer or to a serial
@@ -18,16 +22,9 @@ config EARLY_PRINTK
 config DEBUG_STACKOVERFLOW
 	bool "Check for stack overflows"
 	depends on DEBUG_KERNEL
-
-config KPROBES
-	bool "Kprobes"
-	depends on DEBUG_KERNEL
 	help
-	  Kprobes allows you to trap at almost any kernel address and
-	  execute a callback function.  register_kprobe() establishes
-	  a probepoint and specifies the callback.  Kprobes is useful
-	  for kernel debugging, non-intrusive instrumentation and testing.
-	  If in doubt, say "N".
+	  This option will cause messages to be printed if free stack space
+	  drops below a certain limit.
 
 config DEBUG_STACK_USAGE
 	bool "Stack utilization instrumentation"
@@ -38,16 +35,30 @@ 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 && SOFTWARE_SUSPEND
+
 config DEBUG_PAGEALLOC
-	bool "Page alloc debugging"
-	depends on DEBUG_KERNEL
+	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
 	help
 	  If you say Y here the kernel will use a 4Kb stacksize for the
 	  kernel stack attached to each process/thread. This facilitates
@@ -65,4 +76,24 @@ config X86_MPPARSE
 	depends on X86_LOCAL_APIC && !X86_VISWS
 	default y
 
+config DOUBLEFAULT
+	default y
+	bool "Enable doublefault exception handler" if EMBEDDED
+	depends on !X86_NO_TSS
+	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.
+
+config DEBUG_PARAVIRT
+	bool "Enable some paravirtualization debugging"
+	default y
+	depends on PARAVIRT && DEBUG_KERNEL
+	help
+	  Currently deliberately clobbers regs which are allowed to be
+	  clobbered in inlined paravirt hooks, even in native mode.
+	  If turning this off solves a problem, then DISABLE_INTERRUPTS() or
+	  ENABLE_INTERRUPTS() is lying about what registers can be clobbered.
+
 endmenu