Re: [PATCH v3 1/1] tracing: Remove "__attribute__()" from the type field of event format

[Masami Hiramatsu (Google) <mhiramat@kernel.org>]

On Wed, 23 Jul 2025 11:23:29 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Thu, 24 Jul 2025 00:18:06 +0900
> Masami Hiramatsu (Google) <mhiramat@kernel.org> wrote:
> 
> > > So this will add more work during boot up as it is processed on every
> > > event regardless if it has an eval map or not. But this is only needed
> > > if CONFIG_DEBUG_INFO_BTF=y and PAHOLE_HAS_BTF_TAG=y is enabled.  
> > 
> > Hmm, In this case can we check it in trace_event_update_all()?
> > If we need to sanitize more word, it is easier to add a condition
> > there.
> 
> If we need to sanitize more words later, then we can open it up to
> more. But why do this work when it's not needed. We are going from
> calling this function a 100 times to calling it a 1000 times. That's an
> order of magnitude, and I'm not sure we want to do that if it's not
> needed.

OK, then check before calling.

> 
> > 
> > Or, maybe we can sanitize it while building the kernel as a part
> > of post build process.
> 
> Ideally, that would be best, but parsing the elf file isn't trivial.
> 
> I would say let's just add this conditional for now, and then we can
> start working on a way to parse all of this at build time.

OK, I'll put this in my TODO list ;)

Thanks!

> 
> -- Steve
> 
> 


-- 
Masami Hiramatsu (Google) <mhiramat@kernel.org>