[PATCH 1/3] ftrace: add function tracing to single thread

[Eric W. Biederman]

Ingo Molnar <mingo at elte.hu> writes:

> i dont see the point of the complexity you are advocating. 99.9% of 
> the users run a unique PID space.

I'm not advocating complexity.  I'm advocating using the same APIs as
the rest of the kernel, for doing the same functions.

> Tracing is about keeping stuff simple. On containers we could also 
> trace the namespace ID (is there an easy ID for the namespace, as an 
> easy extension to the very nice PID concept that Unix introduced 
> decades ago?) and be done with it.

I don't really care about the pid namespace in this context.

I am just asking that we compare a different field in the task struct.

I am asking that we don't accumulate new users of an old crufty bug prone
API, for no good reason.

I'm asking that we don't be different for no good reason.

Eric