Re: [PATCH 0/7][RFC] function graph tracer port to PowerPC

On Wed, 2009-02-11 at 20:10 -0500, Steven Rostedt wrote:

The following set of patches are RFC and not for inclusion
(unless everyone is fine with them as is).

This is the port to PowerPC of the function graph tracer that was written
by Frederic Weisbecker for the x86 architecture.  It is broken up
into a series of logical steps.

1) get generic code ready for other archs
2) get PowerPC 64-bit working with just static function tracing
3) get PowerPC 64-bit working with dynamic function tracing
4) get PowerPC 32-bit working with just static function tracing
5) get PowerPC 32-bit working with dynamic function tracing

(with some clean ups in between)


The function graph tracer not only traces the start of a function
(uses the function tracer part for that) but also uses the kprobes
trick to replace the return address with a hook to trace the exit
of the function.

You use the "kprobes trick", but none of the kprobes code (AFAICS).
Couldn't there be some common code between the two?

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

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