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Date:	Sat, 29 Aug 2015 10:36:33 +0800
From:	"Wangnan (F)" <wangnan0@...wei.com>
To:	Alexei Starovoitov <ast@...mgrid.com>, <acme@...hat.com>
CC:	<brendan.d.gregg@...il.com>, <daniel@...earbox.net>,
	<dsahern@...il.com>, <hekuang@...wei.com>, <jolsa@...nel.org>,
	<xiakaixu@...wei.com>, <masami.hiramatsu.pt@...achi.com>,
	<namhyung@...nel.org>, <a.p.zijlstra@...llo.nl>,
	<lizefan@...wei.com>, <pi3orama@....com>,
	<linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 32/32] bpf: Introduce function for outputing data to perf
 event



On 2015/8/29 10:22, Alexei Starovoitov wrote:
> On 8/28/15 7:15 PM, Wangnan (F) wrote:
>> I'd like to see whether it is possible to create dynamic tracepoints so
>> different receivers can listen on different tracepoints.
>
> see my proposal A. I think ftrace instances might work for this.
>
> I'm not sure about 'format' part though. Kernel side shouldn't be
> aware of it. It's only the contract between bpf program and user process
> that deals with it.
>
It is an option. Let's keep an open mind now :)

For current patch 32/32, I think it is useful enough for some simple cases,
and we have already start using it internally. What about keep it as what it
is now and create a independent method for your usecase?

Thank you.

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