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authorIngo Molnar <mingo@elte.hu>2009-01-07 11:05:10 +0100
committerIngo Molnar <mingo@elte.hu>2009-01-07 11:18:59 +0100
commitda4276b8299a6544dc41ac2485d3ffca5811b3fb (patch)
tree8225c30e900cadb4b5dee86a4f70b189cceb3c12
parent0936912274af78a21fd8d54c3f94a50a285cf7f9 (diff)
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: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--lib/Kconfig.debug16
2 files changed, 9 insertions, 8 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 862adb9bf0d4..73f7fe8fd4d1 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -27,6 +27,7 @@ config X86
select HAVE_IOREMAP_PROT
select HAVE_KPROBES
select ARCH_WANT_OPTIONAL_GPIOLIB
+ select ARCH_WANT_FRAME_POINTERS
select HAVE_KRETPROBES
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_DYNAMIC_FTRACE
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 2e75478e9c69..2d0f14490174 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -566,14 +566,14 @@ config DEBUG_NOTIFIERS
config FRAME_POINTER
bool "Compile the kernel with frame pointers"
depends on DEBUG_KERNEL && \
- (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \
- AVR32 || SUPERH || BLACKFIN || MN10300)
- default y if DEBUG_INFO && UML
- help
- If you say Y here the resulting kernel image will be slightly larger
- and slower, but it might give very useful debugging information on
- some architectures or if you use external debuggers.
- If you don't debug the kernel, you can say N.
+ (CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \
+ AVR32 || SUPERH || BLACKFIN || MN10300) || \
+ ARCH_WANT_FRAME_POINTERS
+ default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS
+ help
+ If you say Y here the resulting kernel image will be slightly
+ larger and slower, but it gives very useful debugging information
+ in case of kernel bugs. (precise oopses/stacktraces/warnings)
config BOOT_PRINTK_DELAY
bool "Delay each boot printk message by N milliseconds"