On 2011-09-23 16:21, Jean-Michel Hautbois wrote:
> 2011/9/23 Jan Kiszka <jan.kis...@siemens.com<mailto:jan.kis...@siemens.com>>
> On 2011-09-23 15:58, Jean-Michel Hautbois wrote:
>> 2011/9/23 Gilles Chanteperdrix 
>> <gilles.chanteperd...@xenomai.org<mailto:gilles.chanteperd...@xenomai.org>>
>>
>>> On 09/23/2011 11:49 AM, Jean-Michel Hautbois wrote:
>>>> OK, I have more traces (a few :)) :
>>>
>>> I meant the I-pipe tracer alone. The I-pipe tracer intead of other
>>> ftrace tracers.
>>>
>>>
>> Well, I think it works, I can do a cat /proc/ipipe/trace/max without any
>> error in a kernel which doesn't have any other ftrace function.
>> Do you have one test in particular in mind ?
> 
> Check
> http://git.kiszka.org/?p=ipipe.git;a=shortlog;h=refs/heads/queues/2.6.35-x86-trace
> to get an impression of what is required to get ftrace working on
> x86_64. It is not working on x86_32 e.g. as it depends on the arch
> providing a NMI-safe, ie. task-stack independent current_thread_info().
> That is also not yet the case on Power.
> 
> Interesting, and impressive. Do you plan supporting it for PowerPC ?
> Is there a git branch for that too ?
> I can test on a P2020, if you are interested ;-).

Sorry, this is currently not on any local roadmap.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux

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