[PATCH] for_each_possible_cpu: oprofile.

[powerpc.git] / arch / i386 / Kconfig.debug

diff --git a/arch/i386/Kconfig.debug b/arch/i386/Kconfig.debug
index 5228c40..6e97df6 100644 (file)
--- a/arch/i386/Kconfig.debug
+++ b/arch/i386/Kconfig.debug
@@ -22,16 +22,6 @@ config DEBUG_STACKOVERFLOW
          This option will cause messages to be printed if free stack space
          drops below a certain limit.
 
-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".
-
 config DEBUG_STACK_USAGE
        bool "Stack utilization instrumentation"
        depends on DEBUG_KERNEL
@@ -41,17 +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