linux-kernel - Re: [PATCH] powerpc: compile kernel for linkstations optimized for size

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Message-ID: <Pine.LNX.4.64.0810131959140.9041@axis700.grange>
Date:	Mon, 13 Oct 2008 20:03:25 +0200 (CEST)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Rogério Brito <rbrito@....usp.br>
cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH] powerpc: compile kernel for linkstations optimized for
 size

On Mon, 13 Oct 2008, Rogério Brito wrote:

> From: Rogério Brito <rbrito@....usp.br>
> 
> Since Linkstations and Kuroboxes often have *very* little memory (as
> they are embedded systems), it is desirable to get their kernels
> compiled optimized for size.
> 
> Signed-off-by: Rogério Brito <rbrito@....usp.br>
> 
> ---
> 
> I have been using kernels optimized for size on my Kurobox (standard)
> for many different releases and I have experienced no problem with this
> option enabled. Thus, this patch.

The comment for this option says: "watch out for broken compilers," if 
this doesn't hold any more, it should be remove, if it still holds, I 
wouldn't turn this on by default, as I don't think we can test all 
possible (cross- or native-) compilers users might want to use. In any 
case this is one of options that users can select themselves, if it suits 
them. Also I don't think your CC list is correct, you wanted to send this 
to the powerpc list and one of powerpc / subarch maintainer.

Thanks
Guennadi

> 
> --- linux/arch/powerpc/configs/linkstation_defconfig.old	2008-10-13 00:33:00.000000000 -0300
> +++ linux/arch/powerpc/configs/linkstation_defconfig	2008-10-13 00:38:58.000000000 -0300
> @@ -90,7 +90,7 @@ CONFIG_NAMESPACES=y
>  # CONFIG_PID_NS is not set
>  CONFIG_BLK_DEV_INITRD=y
>  CONFIG_INITRAMFS_SOURCE=""
> -# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
> +CONFIG_CC_OPTIMIZE_FOR_SIZE=y
>  CONFIG_SYSCTL=y
>  # CONFIG_EMBEDDED is not set
>  CONFIG_SYSCTL_SYSCALL=y
> 
> 
> -- 
> Rogério Brito : rbrito@...ckenzie,ime.usp}.br : GPG key 1024D/7C2CAEB8
> http://www.ime.usp.br/~rbrito : http://meusite.mackenzie.com.br/rbrito
> Projects: algorithms.berlios.de : lame.sf.net : vrms.alioth.debian.org
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@...abs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
> 

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
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