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

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Date:	Thu, 12 Feb 2009 17:47:21 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linuxppc-dev@...abs.org, Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH 0/7][RFC] function graph tracer port to PowerPC

On Thu, Feb 12, 2009 at 11:31:44AM -0500, Steven Rostedt wrote:
> 
> On Thu, 12 Feb 2009, Frederic Weisbecker wrote:
> 
> > On Wed, Feb 11, 2009 at 08:10:51PM -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)
> > > 
> > 
> > 
> > Thanks a lot Steven!
> > I'm sad to not having a Power Pc to test it...
> 
> BTW, Can I count that as an Acked-by: for the first patch. Since the first 
> patch does modify your code.
> 
> -- Steve
> 


Yes of course, I knew most of it was architecture independant but I delayed
this TODO for future ports, and you've done it.

Thanks.

Just a micro detail: the ftrace_push/pop_return_trace are parts of
the core of the entry/return probe, something that could be used
by other users than the function graph tracer itself.

Perhaps it would be better to put them in kernel/trace/ftrace.c
What do you think?

Anyway, Acked-by: Frederic Weisbecker <fweisbec@...il.com>

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