Re: [PATCH 0/2] Enable new kprobe event at boot

Steven Rostedt
2019-05-21T13:33:23Z

On Tue, 21 May 2019 16:56:16 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:

> Note that 'trace_event=' option enables trace event at very early
> timing, but the events added by 'kprobe_event=' are enabled right
> before enabling device drivers at this point. It is enough for
> tracing device driver initialization etc.

Nice!

I wonder if we can have this called before the trace_event boot is
analyzed. Then have the kprobe_event work more like the kprobe_events
file, and not enable the kprobes but only create them. If you want to
enable them you do a trace_event=kprobes as well.

Perhaps we could enable kprobes at early init?

What do you think? Or is there something else in kprobes that prevents
such an early enabling of it?

-- Steve