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

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Message-ID: <51014B9A.5080500@zytor.com>
Date:	Thu, 24 Jan 2013 08:56:26 -0600
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...e.de>, Ingo Molnar <mingo@...nel.org>,
	ling.ma.program@...il.com, mingo@...hat.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, Ma Ling <ling.ml@...pay.com>
Subject: Re: [Suggestion] [x86]: Compiler Option Os is better on latest x86

On 01/24/2013 08:46 AM, Borislav Petkov wrote:
> 
> Hmm, I'm not sure about -Os: 3a55fb0d9fe8e2f4594329edd58c5fd6f35a99dd
> 
> And 0.01/0.03 IPC improvement doesn't really look too persuasive IMO.
> 

There has been occasional talk about a -Ok(ernel) option to gcc, but
that would require someone to go through gcc and figure out what bits
makes sense and which don't...

	-hpa

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