On 2017/02/19 01:42PM, Masami Hiramatsu wrote:

On Fri, 17 Feb 2017 17:42:54 -0300
Arnaldo Carvalho de Melo [off-list ref] wrote:

quoted

Em Fri, Feb 17, 2017 at 07:44:33PM +0900, Masami Hiramatsu escreveu:

quoted

On Thu, 16 Feb 2017 13:47:37 +0530
"Naveen N. Rao" [off-list ref] wrote:

quoted

I am posting the powerpc bits in the same thread so as to keep these
changes together. I am not sure how this should be taken upstream as
there are atleast three different trees involved: one for the core
kprobes infrastructure, one for powerpc and one for perf.

quoted

Hmm, could you make these (and other related) patches and
other series in one series? Or wait for the other series
are merged correctly.

Well, patches like these should be done in a way that the tooling parts
can deal with kernels with or without the kernel changes, so that older
tools work with new kernels and new tools work with older kernels.

"work" as in the previous behaviour is kept when a new tool deals with
an older kernel and an older tool would warn the user that what it needs
is not present in that kernel.

Is this the case? I just looked briefly at the patch commit logs.

Thanks Arnaldo,

Naveen, I think this one and your previous series are incompatible
with older kernel. So those should be merged in one series and
at least (1) update ftrace's README special file to show explicitly
which can accept text+offset style for kretprobes, and 

Sure - do you mean Documentation/trace/kprobetrace.txt? And, do you want 
me to include kernel version where this changed?

(2) update
perf probe side to ensure that (and fallback to previous logic if not).

Sure. I am trying out an approach and will post it as soon as it's 
ready.

Thanks!
- Naveen