Re: [PATCH v4 7/7] kernel.h: drop trace_printk.h

[Steven Rostedt]

On Mon, 5 Jan 2026 14:33:35 -0500
Joel Fernandes <joelagnelf@xxxxxxxxxx> wrote:

> >>> I'm thinking that my proposed config option is the best solution now. For
> >>> those that do not care about debugging the kernel, you enable the
> >>> "HIDE_TRACE_PRINTK" config so that your builds will be "quicker". But for
> >>> everyone else, it will not slow down their workflow when they need to debug
> >>> code.  
> >>
> >> 100% agree. We do have people running custom configs for faster builds, so this
> >> hide thing could be enabled there assuming those don't care about debug.
> >>
> >> In other words, "If it aint broke, don't fix it".  
> > 
> > But if I understand correctly, it would save 2% build time. That means 12
> > secondes on a 10 minutes build. Is it really worth it ?
> >   
> 99% of my kernel builds are usually 90 seconds. I throw a lot of cores at it and
> with ccache. I care more about trace_printk not being available than saving 2%.
> But YMMV. I am sure there are people who care a lot about build time, but for me
> it has not (yet) been a problem.

I can see Linus enabling this. I don't think he uses trace_printk() to
debug the kernel, so improving his build times may be useful.

-- Steve