Re: [PATCH v2 1/2] tracing: Add task_prctl_unknown tracepoint

[Steven Rostedt]

On Thu, 7 Nov 2024 16:46:47 +0100
Marco Elver <elver@xxxxxxxxxx> wrote:

> > My concern is that we start adding tons of special-case
> > tracepoints to the implementation of system calls which
> > are redundant with the sys_enter/exit tracepoints.
> >
> > Why favor this approach rather than hooking on sys_enter/exit ?  
> 
> It's __extremely__ expensive when deployed at scale. See note in
> commit description above.

Agreed. The sys_enter/exit trace events make all syscalls go the slow path,
which can be quite expensive.

-- Steve