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From: Marco Gerards <mgerards@xs4all.nl>
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In-Reply-To: <Pine.LNX.4.64.0610101246320.10244@boston.corp.fedex.com> (Jeff
	Chua's message of "Tue, 10 Oct 2006 12:59:35 +0800 (SGT)")
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Cc: Jeff Chua <jchua@fedex.com>
Subject: Re: how to increase commandline size (patch + changelog)
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Jeff Chua <jeff84@silk.corp.fedex.com> writes:

> On Mon, 9 Oct 2006, Hollis Blanchard wrote:
>
>>> Shall I use '#ifdef __linux__' to include <asm/param.h> only on linux, and
>>> '#define COMMAND_LINE_SIZE 255' for non-linux system?
>>
> 5B> Well, does this number change often? If not, let's just copy it.
>>
>> If so, then we're screwed anyways because asm/param.h would only match
>> the installed kernel's limit, so may not work for other kernel versions.
>
> You're right. asm/param.h determines the limit. We've read this from
> here for linux.
>
> The idea is that there are users out there who wants to pass quite a
> few parameters during boot, and loadlin currently handles this. I'm
> passing network address, netmask, broadcast, hostname, modules_to_load
> and boot the system up using ramdisk. This allow every system to be
> unique and yet able to boot from the same CDROM/image.
>
> So, another approach is to use "configure --CommandLineSize=1024" to
> specify the size, but I thought reading from asm/param.h would be
> easier.

I don't like limits that are introduced at compile time.  It means
that either things break when a kernel with other limits are used.  Or
that users will get binaries with limits (for example, when using a
GRUB 2 package).

--
Marco