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From: "Du, Changbin" <changbin.du@intel.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	changbin.du@intel.com, yamada.masahiro@socionext.com,
	michal.lkml@markovi.net, tglx@linutronix.de, mingo@redhat.com,
	rdunlap@infradead.org, x86@kernel.org, lgirdwood@gmail.com,
	broonie@kernel.org, arnd@arndb.de, linux-kbuild@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH v2 4/5] kernel hacking: new config DEBUG_EXPERIENCE to apply GCC -Og optimization
Date: Thu, 3 May 2018 21:45:46 +0800	[thread overview]
Message-ID: <20180503134546.5p3z4g5na7ew4fun@intel.com> (raw)
In-Reply-To: <20180502211956.6c9e8d7b@vmware.local.home>

On Wed, May 02, 2018 at 09:19:56PM -0400, Steven Rostedt wrote:
> On Wed, 2 May 2018 13:45:58 -0700
> Andrew Morton <akpm@linux-foundation.org> wrote:
> 
> > On Wed, 2 May 2018 10:17:07 -0400 Steven Rostedt <rostedt@goodmis.org> wrote:
> > 
> > > > Comparison of vmlinux size: a bit smaller.
> > > > 
> > > >     w/o CONFIG_DEBUG_EXPERIENCE  
> > > 
> > > I hate the config name.
> > > 
> > > I probably can't come up with better ones but let's try:
> > > 
> > >  CONFIG_DEBUG_OPTIMIZE ?
> > >  CONFIG_OPTIMIZE_DEBUG ?
> > > 
> > > But "EXPERIENCE" sounds like I'm on some DEBUG LSD.  
> > 
> > Metoo, but the gcc people decided on "-Og: Optimize debugging
> > experience ..." and I think there are benefits if the kernel is to
> > align the naming with that.
> 
> I still see that as "Optimize debugging" and "experience" is just the
> platform of what was done.
> 
> 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.

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.

-- 
Thanks,
Changbin Du

  reply	other threads:[~2018-05-03 13:55 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-02 13:44 [PATCH v2 0/5] kernel hacking: GCC optimization for debug experience (-Og) changbin.du
2018-05-02 13:44 ` [PATCH v2 1/5] x86/mm: surround level4_kernel_pgt with #ifdef CONFIG_X86_5LEVEL...#endif changbin.du
2018-05-02 13:44 ` [PATCH v2 2/5] regulator: add dummy function of_find_regulator_by_node changbin.du
2018-05-02 13:44 ` [PATCH v2 3/5] kernel hacking: new config NO_AUTO_INLINE to disable compiler auto-inline optimizations changbin.du
2018-05-02 14:07   ` Steven Rostedt
2018-05-02 20:27   ` Arnd Bergmann
2018-05-03 13:00     ` Du, Changbin
2018-05-03 14:16       ` Steven Rostedt
2018-05-02 13:44 ` [PATCH v2 4/5] kernel hacking: new config DEBUG_EXPERIENCE to apply GCC -Og optimization changbin.du
2018-05-02 14:17   ` Steven Rostedt
2018-05-02 20:45     ` Andrew Morton
2018-05-03  1:19       ` Steven Rostedt
2018-05-03 13:45         ` Du, Changbin [this message]
2018-05-03 14:28           ` Steven Rostedt
2018-05-05 23:57             ` Du, Changbin
2018-05-06  0:27               ` Randy Dunlap
2018-05-02 19:26   ` Randy Dunlap
2018-05-02 13:45 ` [PATCH v2 5/5] asm-generic: fix build error in fix_to_virt with CONFIG_DEBUG_EXPERIENCE changbin.du
2018-05-02 14:19   ` Steven Rostedt
2018-05-03 13:25     ` Du, Changbin
2018-05-03 14:19       ` Steven Rostedt
2018-05-03 16:39         ` weylin
2018-05-02 14:56 ` [PATCH v2 0/5] kernel hacking: GCC optimization for debug experience (-Og) Daniel Thompson
2018-05-03 13:49   ` Du, Changbin

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