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Commit da4276b8 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: offer frame pointers in all build modes 



CONFIG_FRAME_POINTERS=y results in much better debug info for the
kernel (clear and precise backtraces), with the only drawback being
a ~1% increase in kernel size.

So offer it unconditionally and enable it by default.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 09369122

arch/x86/Kconfig

+1 −0
Original line number Original line Diff line number Diff line
@@ -27,6 +27,7 @@ config X86 
	select HAVE_IOREMAP_PROT

	select HAVE_IOREMAP_PROT

	select HAVE_KPROBES

	select HAVE_KPROBES

	select ARCH_WANT_OPTIONAL_GPIOLIB

	select ARCH_WANT_OPTIONAL_GPIOLIB

	select ARCH_WANT_FRAME_POINTERS

	select HAVE_KRETPROBES

	select HAVE_KRETPROBES

	select HAVE_FTRACE_MCOUNT_RECORD

	select HAVE_FTRACE_MCOUNT_RECORD

	select HAVE_DYNAMIC_FTRACE

	select HAVE_DYNAMIC_FTRACE

lib/Kconfig.debug

+8 −8
Original line number Original line Diff line number Diff line
@@ -566,14 +566,14 @@ config DEBUG_NOTIFIERS 
config FRAME_POINTER

config FRAME_POINTER

	bool "Compile the kernel with frame pointers"

	bool "Compile the kernel with frame pointers"

	depends on DEBUG_KERNEL && \

	depends on DEBUG_KERNEL && \

		(X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \

		(CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \

		 AVR32 || SUPERH || BLACKFIN || MN10300)

		 AVR32 || SUPERH || BLACKFIN || MN10300) || \

	default y if DEBUG_INFO && UML

		ARCH_WANT_FRAME_POINTERS

	help

	default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS

	  If you say Y here the resulting kernel image will be slightly larger

	help

	  and slower, but it might give very useful debugging information on

	  If you say Y here the resulting kernel image will be slightly

	  some architectures or if you use external debuggers.

	  larger and slower, but it gives very useful debugging information

	  If you don't debug the kernel, you can say N.

	  in case of kernel bugs. (precise oopses/stacktraces/warnings)





config BOOT_PRINTK_DELAY

config BOOT_PRINTK_DELAY

	bool "Delay each boot printk message by N milliseconds"

	bool "Delay each boot printk message by N milliseconds"