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SubjectRe: [PATCH v2 4/5] kernel hacking: new config DEBUG_EXPERIENCE to apply GCC -Og optimization
On Thu, May 03, 2018 at 10:28:23AM -0400, Steven Rostedt wrote:
> On Thu, 3 May 2018 21:45:46 +0800
> "Du, Changbin" <changbin.du@intel.com> wrote:
>
> > > With that gcc comment, I still think CONFIG_OPTIMIZE_DEBUG is more
> > > inline with what it is and understandable than
> > > CONFIG_DEBUG_EXPERIENCE. The "OPTIMIZE" is the key word there.
> > >
> > > -- Steve
> > What about CONFIG_CC_OPTIMIZE_FOR_DEBUGGING? We alreay have
> > CONFIG_CC_OPTIMIZE_FOR_SIZE and CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE.
>
> Yes I like that much better.
>
> >
> > And do we need to move it to existing configuration menu "General setup->
> > Compiler optimization level"? But I also want it appear in "kernel hacking"
> > since this is a debug option.
>
> I understand why you would want it by debugging, but I think it does
> make more sense to be included with the above two other options, as
> they are all mutually exclusive.
>
> This brings up the topic of creating config paradigms. That is, a way
> of saying "I want a debug kernel" and select one option that selects
> everything you would expect. Or perhaps we should have a:
>
> make debug_config
>
Agree, I accomplish this by running script scripts/kconfig/merge_config.sh.

> that does it.
>
> But that's a different topic. For now, I would just included it in
> init/Kconfig, and not worry about it not showing up in kernel hacking.
>
>
> -- Steve

--
Thanks,
Changbin Du

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