Re: [PATCH -tip perf/probes 00/10] x86 insn decoder bugfixes and perf-probe syntax changes

Frederic Weisbecker wrote:
> On Mon, Nov 02, 2009 at 04:16:25PM -0500, Masami Hiramatsu wrote:
>> Masami Hiramatsu wrote:
>>> Ingo Molnar wrote:
>>>> What we want here is two fold:
>>>>
>>>>     - enable kprobes event support when perf events is enabled and kprobes
>>>>       is enabled. We dont want another config option for it.
>>>
>>> Sure, at least that combination should enable kprobe-tracer forcibly.
>>
>> Hmm, someone may not want to enables kprobe-tracer. Perhaps,
>> "default y if (EVENT_PROFILE)" is enough, isn't it?
>>
>
>
> I guess it should be sufficient yeah. We want to strongly recommend
> the kprobe events if we have enabled perf, but we don't want to force
> it.
>
> Also in this case we need a verbose runtime report of the lack of this
> tracer in debugfs from perf probe if needed.

Sure, error message should be changed as warning user to enable
CONFIG_KPROBE_TRACER 

Thank you,

--

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat <at> redhat.com