[Devel] Re: [PATCH 3/3] ftrace: trace single pid for function graph tracer

[Steven Rostedt]

On Wed, 3 Dec 2008, Andrew Morton wrote:

> On Wed, 03 Dec 2008 15:36:59 -0500
> Steven Rostedt <rostedt at goodmis.org> wrote:
> 
> > This patch makes the changes to set_ftrace_pid apply to the function
> > graph tracer.
> 
> That sentence needs help.

Medic!

> 
> >  # echo $$ > /debugfs/tracing/set_ftrace_pid
> >  # echo function_graph > /debugfs/tracing/current_tracer
> > 
> > Will cause only the current task to be traced. Note, the trace flags are
> > also inherited by child processes, so the children of the shell
> > will also be traced.
> 
> Where did we end up on the pids-arent-unique issue?  Gave up?

Nah, patch 2 opens the door for a solution. I'm just pawning the work off 
to the container folks ;-)

-- Steve

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