linux-kernel - Re: [PATCH 1/7] tracing/function-graph-tracer: make arch generic push pop functions

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Message-ID: <alpine.DEB.1.10.0902181218360.11411@gandalf.stny.rr.com>
Date:	Wed, 18 Feb 2009 12:29:23 -0500 (EST)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Geoff Levand <geoffrey.levand@...sony.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: [PATCH 1/7] tracing/function-graph-tracer: make arch generic
 push pop functions


On Wed, 18 Feb 2009, Ingo Molnar wrote:

> 
> * Steven Rostedt <rostedt@...dmis.org> wrote:
> 
> > On Wed, 18 Feb 2009, Ingo Molnar wrote:
> > 
> > > 
> > > * Steven Rostedt <rostedt@...dmis.org> wrote:
> > > 
> > > > Ingo,
> > > > 
> > > > This patch is to make function graph arch generic. But since 
> > > > the PowerPC changes depend on it, we want to push it through 
> > > > the PowerPC tree. But since it touches x86 code, can you give 
> > > > an Acked-by to it?
> > > 
> > > hm, but it's all ftrace bits. Could this go through the tracing 
> > > tree? That's how it's generally done for most cross-arch 
> > > subsystems. By having it in a separate tree we risk conflicts 
> > > and various logistics problems. It's not like the PPC tree is 
> > > modifying its ftrace.c file all that frequently, right?
> > 
> > Ingo,
> > 
> > How about this. We could incorporate some of the power of git. 
> > I could make a separate branch based off of Linus's 2.6.29-rc5 
> > announcement, and apply just this patch (the ftrace generic 
> > and x86 change). If you give me your Acked-by, I'll add that 
> > too.
> > 
> > This way, both you and Ben could pull from this branch to get 
> > the one change. When it goes upstream, because it has the same 
> > SHA1, git could easily resolve it.
> 
> Sure, that's fine too - if the separate tree is semantically 
> meaningful. If it pulls in too many ftrace prerequisites i doubt 
> it's appropriate for the PPC tree.

Yeah, I'll just make a new branch based off of Linus's 2.6.29-rc5 
announcement, and add the one patch, and not touch it again. This will be 
a simple merge of one patch from a change set that is in both trees.

-- Steve

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