Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Sat, 6 Nov 2010 19:06:28 +0000 | Subject | Re: [PATCH 6/6] ARM: ftrace: enable function graph tracer | From | Catalin Marinas <> |
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On Saturday, November 6, 2010, Rabin Vincent <rabin@rab.in> wrote: > Add the options to enable the function graph tracer on ARM. Function > graph tracer support requires frame pointers, so exclude Thumb-2 and > also explicitly select FRAME_POINTER in FUNCTION_GRAPH_TRACER since > FUNCTION_TRACER doesn't select FRAME_POINTER when ARM_UNWIND is used > Therefore, with GCC 4.4.0+, you get plain function tracing without frame > pointers, but you'll need them if you want function graph tracing. ..... > --- a/kernel/trace/Kconfig > +++ b/kernel/trace/Kconfig > @@ -141,6 +141,7 @@ config FUNCTION_TRACER > > config FUNCTION_GRAPH_TRACER > bool "Kernel Function Graph Tracer" > + select FRAME_POINTER if ARM_UNWIND
Would it be better to modify FRAME_POINTER definition in the ARM Kconfig so that it is enabled automatically when FUNCTION_GRAPH_TRACER is enabled?
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