On 2011-09-23 15:58, Jean-Michel Hautbois wrote:
> 2011/9/23 Gilles Chanteperdrix <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 ?

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.


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

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