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From: Andi Kleen <ak@muc.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
Arjan van de Ven <arjan@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [patch] x86: add -freg-struct-return to CFLAGS
Date: 22 Feb 2007 12:23:28 +0100 [thread overview]
Date: Thu, 22 Feb 2007 12:23:28 +0100 [thread overview]
Message-ID: <20070222112328.GB10190@muc.de> (raw)
In-Reply-To: <20070222083822.GB15068@elte.hu>
On Thu, Feb 22, 2007 at 09:38:22AM +0100, Ingo Molnar wrote:
> Subject: [patch] x86: add -freg-struct-return to CFLAGS
> From: Ingo Molnar <mingo@elte.hu>
>
> Jeremy Fitzhardinge suggested the use of -freg-struct-return, which does
> structure-returns (such as when using pte_t) in registers instead of on
> the stack.
>
> that is indeed so, and this option reduced the kernel size a bit:
>
> text data bss dec hex filename
> 4799506 543456 3760128 9103090 8ae6f2 vmlinux.before
> 4798117 543456 3760128 9101701 8ae185 vmlinux.after
>
> the resulting kernel booted fine on my testbox. Lets go for it.
Ok I added it for now. Let's see what happens.
I guess people maintaining external Makefiles without Kbuild
are in for a nasty surprise again though. Cannot be avoided unfortunately.
-Andi
next prev parent reply other threads:[~2007-02-22 11:23 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-22 1:28 -freg-struct-return? Jeremy Fitzhardinge
2007-02-22 8:04 ` -freg-struct-return? Arjan van de Ven
2007-02-22 8:09 ` -freg-struct-return? Jeremy Fitzhardinge
2007-02-22 8:15 ` -freg-struct-return? Arjan van de Ven
2007-02-22 8:30 ` -freg-struct-return? Jeremy Fitzhardinge
2007-02-22 8:37 ` -freg-struct-return? Ingo Molnar
2007-02-22 8:38 ` [patch] x86: add -freg-struct-return to CFLAGS Ingo Molnar
2007-02-22 11:23 ` Andi Kleen [this message]
2007-02-22 11:27 ` Arjan van de Ven
2007-02-22 18:35 ` Adrian Bunk
2007-02-22 22:31 ` H. Peter Anvin
2007-02-22 9:50 ` -freg-struct-return? Jakub Jelinek
2007-02-22 11:22 ` -freg-struct-return? Andi Kleen
2007-02-22 16:42 ` -freg-struct-return? H. Peter Anvin
2007-02-22 17:39 ` -freg-struct-return? Jeremy Fitzhardinge
2007-02-22 18:36 ` -freg-struct-return? Andi Kleen
2007-02-22 18:48 ` -freg-struct-return? H. Peter Anvin
2007-02-23 0:21 ` -freg-struct-return? Andi Kleen
2007-02-22 18:56 ` -freg-struct-return? Jan Engelhardt
2007-02-22 19:12 ` -freg-struct-return? H. Peter Anvin
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