linux-kernel - Re: Userspace visible of 3 include/asm/ headers

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Message-ID: <20060803215230.GI25692@stusta.de>
Date:	Thu, 3 Aug 2006 23:52:31 +0200
From:	Adrian Bunk <bunk@...sta.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: Userspace visible of 3 include/asm/ headers

On Thu, Aug 03, 2006 at 02:28:43PM -0700, H. Peter Anvin wrote:
> Dave Jones wrote:
> >
> > > Header        : setup.h
> > > Architectures : i386, ia64, x86_64
> > > Contents:
> > > - COMMAND_LINE_SIZE on ia64, x86_64
> > > - much more on i386
> > > Should COMMAND_LINE_SIZE be visible to userspace?
> >
> >Bootloaders probably need to know this.
> >
> 
> COMMAND_LINE_SIZE should be moved to a different header and be made 
> common between all architectures.

On different architectures, we have the following values for 
COMMAND_LINE_SIZE:
- 256
- 512
- 896
- 1024
- 4096

What should be the common value?
4096?

And I have a rough memory of some dependencies of COMMAND_LINE_SIZE and 
boot loaders. What exactly must be taken care of when increasing 
COMMAND_LINE_SIZE?

> 	-hpa

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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