[Linuxppc-users] function_graph feature or its alternatives

[Michael Ellerman]

Hi George,

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

cheers