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

[Joel Fernandes <joelagnelf@nvidia.com>]

On 1/5/2026 3:04 PM, Steven Rostedt wrote:
> On Mon, 5 Jan 2026 14:33:35 -0500
> Joel Fernandes <joelagnelf@nvidia.com> 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.

Sounds good to me. Making it an option sounds okay to me. Thanks.