Re: [PATCH] stm class: Document the stm_ftrace

From	Alexander Shishkin <alexander.shishkin@linux.intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] stm class: Document the stm_ftrace
Date	2017-03-20 12:20 +0100
Message-ID	<tn3vZ-3VF-33@gated-at.bofh.it> (permalink)
References	<tmZiH-RH-19@gated-at.bofh.it> <tn1DP-2AT-5@gated-at.bofh.it> <tn3cC-3xv-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Chunyan Zhang <zhang.lyra@gmail.com> writes:

> Hi Alex,
>
> On 20 March 2017 at 16:49, Alexander Shishkin
> <alexander.shishkin@linux.intel.com> wrote:
>> Hi Chunyan,
>>
>> A couple of clarifications: iirc this applies to the function tracer
>> of ftrace, right? Does it make sense to mention that? Also, are you
>
> Right, only applies to the function tracer currently (actually only
> function address and parent function address of Function tracer is
> recorded into STM, I mean it doesn't include like "pid" "task name"
> "cpu-id" these information right now). It makes sense to mention
> function tracer, I will address that.

Thanks!

>> planning to support other ftrace payloads like trace_printk()s?
>
> No plan so far, but I think I can consider to do that, it depends on
> how many people think that are helpful.
> What do you think?

Well, I myself almost never use function tracer, but I do use
tracepoints/trace_printk()s. I'm *guessing* that everybody who's
subsystem implement tracepoints will be interested in those.

I confess that I haven't yet looked at the code properly, so I'm a don't
have a picture of what it will take to implement these.

Regards,
--
Alex

Thread

[PATCH] stm class: Document the stm_ftrace Chunyan Zhang <chunyan.zhang@spreadtrum.com> - 2017-03-20 07:50 +0100
  Re: [PATCH] stm class: Document the stm_ftrace Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-03-20 10:20 +0100
    Re: [PATCH] stm class: Document the stm_ftrace Chunyan Zhang <zhang.lyra@gmail.com> - 2017-03-20 12:00 +0100
      Re: [PATCH] stm class: Document the stm_ftrace Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-03-20 12:20 +0100
        Re: [PATCH] stm class: Document the stm_ftrace Chunyan Zhang <zhang.lyra@gmail.com> - 2017-03-21 07:10 +0100
          Re: [PATCH] stm class: Document the stm_ftrace Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2017-03-21 08:40 +0100
            Re: [PATCH] stm class: Document the stm_ftrace Chunyan Zhang <zhang.lyra@gmail.com> - 2017-03-21 13:30 +0100

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