linux-kernel - Re: [PATCH 0/9] powerpc: port of dynamic ftrace

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Message-ID: <20081120145353.GA13550@elte.hu>
Date:	Thu, 20 Nov 2008 15:53:53 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Milton Miller <miltonm@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>, linuxppc-dev@...abs.org
Subject: Re: [PATCH 0/9] powerpc: port of dynamic ftrace


* Steven Rostedt <rostedt@...dmis.org> wrote:

>     branch: ppc/ftrace-disable
> 
> 
> Matt Fleming (1):
>       ftrace: align __mcount_loc sections
> 
> Steven Rostedt (8):
>       ftrace: disable dynamic ftrace from PowerPC
>       powerpc: ftrace, do not latency trace idle
>       powerpc: ftrace, convert to new dynamic ftrace arch API
>       powerpc/ppc64: ftrace, mcount record powerpc port
>       powerpc: ftrace, use probe_kernel API to modify code
>       powerpc/ppc64: ftrace, handle module trampolines for dyn ftrace
>       powerpc/ppc32: ftrace, enabled dynamic ftrace
>       powerpc/ppc32: ftrace, dynamic ftrace to handle modules
> 
> ----
>  arch/powerpc/Kconfig              |    2 +
>  arch/powerpc/include/asm/ftrace.h |   14 +-
>  arch/powerpc/include/asm/module.h |   16 ++-
>  arch/powerpc/kernel/ftrace.c      |  473 +++++++++++++++++++++++++++++++++---
>  arch/powerpc/kernel/idle.c        |    5 +
>  arch/powerpc/kernel/module_32.c   |   10 +
>  arch/powerpc/kernel/module_64.c   |   13 +
>  kernel/trace/Kconfig              |    1 +
>  scripts/recordmcount.pl           |   20 ++-
>  9 files changed, 511 insertions(+), 43 deletions(-)
> 
> There is a dependency on Matt's commit for one of the PPC commits to 
> apply.  I could hack that commit to work without Matt's patch, but 
> then that just postpones conflicts later on.
> 
> Matt's change is this:
> 
>  scripts/recordmcount.pl           |   20 ++-

looks much better and the (minimal) generic impact is OK i think - as 
long as Paul Acks the powerpc changes we could freeze that branch (so 
that Paul can pull it in a few weeks) and base your ftrace-powerpc 
work on that.

( The branch should still be named something constructive like 
  powerpc-ftrace-v29 or so - not ppc/ftrace-disable - but that's a 
  detail. )

	Ingo
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