linux-kernel - Re: [PATCH V2] [x86]: Compiler Option Os is better on latest x86

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Message-ID: <20130127130905.GD3933@gmail.com>
Date:	Sun, 27 Jan 2013 14:09:05 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	ling.ma.program@...il.com
Cc:	mingo@...hat.com, tglx@...utronix.de, hpa@...or.com,
	linux-kernel@...r.kernel.org, Ma Ling <ling.ml@...pay.com>
Subject: Re: [PATCH V2] [x86]: Compiler Option Os is better on latest x86

* ling.ma.program@...il.com <ling.ma.program@...il.com> wrote:

> In this version we also append CONFIG_CC_OPTIMIZE_FOR_SIZE for i386.

Were those measurements done on i386 as well? I'd be content 
with keeping the current minimal - and mostly documentary - 
patch that only does this on 64-bit. I just wanted to record the 
current benchmark numbers mostly.

Also see the discussion with Linus - this is by no far an 
unconditionally good option and we'll probably have to wait for 
more GCC action (-Ok or so) before being able to enable size 
optimizations everywhere without unacceptable trade-offs.

Thanks,

	Ingo
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