[Linuxppc-users] function_graph feature or its alternatives

[Paul Menzel]

Dear Naveen,


On 07/20/18 11:16, Naveen N. Rao wrote:
> Dan Horák wrote:
>> On Fri, 20 Jul 2018 10:59:59 +1000 Michael Ellerman wrote:

>>> "George Chochia" <chochia at us.ibm.com> writes:

>>> > sending the info: kernel: 4.14.0-49.10.1.el7a.ppc64le
>>>
>>> OK, so that explains some of the confusion.
>>>
>>> Typically "4.14.0" would mean the upstream "v4.14" tag, ie. the
>>> version prior to "4.14.1", which is different from what you have
>>> above.
>>>
>>> You need to quote the full version string when talking about distro
>>> kernels.
>>>
>>> If you use `uname -r` that should give you the right thing.
>>>
>>> > The config file has > CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
>>> >
>>> > but it does not appear in the list of available tracers
>>>
>>> The HAVE symbol says that the architecture supports the tracer, but
>>> not that it's enabled.
>>>
>>> As Naveen said you need CONFIG_FUNCTION_GRAPH_TRACER=y.
>>>
>>> It's up to Redhat to decide what tracers they enable.
>>
>> but partners and customers can influence such decisions, thus I would
>> recommend checking it with Red Hat
> 
> Indeed, and that has been requested.

Just to be clear, is there an open issue/ticket for that in the
Red Hat bug tracker [1]?


Kind regards,

Paul


[1]: https://bugzilla.redhat.com/

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