Re: [PATCH] tracing: Add task_prctl_unknown tracepoint

[Steven Rostedt]

On Wed, 6 Nov 2024 10:22:15 +0100
Marco Elver <elver@xxxxxxxxxx> wrote:

> On Tue, 5 Nov 2024 at 18:22, Marco Elver <elver@xxxxxxxxxx> wrote:
> ...
> > > > > I'm also surprised that the comm didn't show in the trace_pipe.  
> > > >
> > > > Any config options or tweaks needed to get it to show more reliably?
> > > >  
> > > > > I've
> > > > > updated the code so that it should usually find it. But saving it here may
> > > > > not be a big deal.  
> > >
> > > How did you start it? Because it appears reliable for me.  
> >
> > Very normally from bash. Maybe my env is broken in other ways, I'll
> > dig a little.  
> 
> Some trial and error led me to conclude it's a race between the logic
> looking up the comm and the process exiting: If the test program exits
> soon after the traced event, it doesn't print the comm. Adding a
> generous usleep() before it exits reliably prints the comm.

Thanks for letting me know. Let me see if I can fix that!

-- Steve