linux-kernel - Re: PATCH][RFC][resend] CC_OPTIMIZE_FOR

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Message-ID: <AANLkTinmAJsXy=iJ5Fq-+CLTAGXTtLGhULRUf=Q1rkY1@mail.gmail.com>
Date:	Tue, 22 Mar 2011 10:21:18 +0200
From:	Pekka Enberg <penberg@...nel.org>
To:	Jesper Juhl <jj@...osbits.net>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Daniel Lezcano <daniel.lezcano@...e.fr>,
	Eric Paris <eparis@...hat.com>,
	Roman Zippel <zippel@...ux-m68k.org>,
	linux-kbuild@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: PATCH][RFC][resend] CC_OPTIMIZE_FOR_SIZE should default to N

Hi Jesper,

On Mon, Mar 21, 2011 at 10:08 PM, Jesper Juhl <jj@...osbits.net> wrote:
> I believe that the majority of systems we are built on want a -O2 compiled
> kernel. Optimizing for size (-Os) is mainly benneficial for embedded
> systems and systems with very small CPU caches (correct me if I'm wrong).

Please take a look at commit 0910b44 ("Expose "Optimize for size"
option for everybody") for the reasoning behind defaulting to -Os.

                        Pekka
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