linux-kernel - Re: [PATCH] THE LINUX/I386 BOOT PROTOCOL

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Message-ID: <44F1E970.1050709@zytor.com>
Date:	Sun, 27 Aug 2006 11:50:24 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <ak@...e.de>
CC:	Alon Bar-Lev <alon.barlev@...il.com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] THE LINUX/I386 BOOT PROTOCOL - Breaking the 256 limit
 (ping)

Andi Kleen wrote:
> 
> The last time I tried this on x86-64 lilo on systems that used EDD broke.
> EDD uses part of the bootup page too. So most likely it's not that simple.
> 
> And please don't shout your subjects.
> 

On i386, the command line is never stored in the bootup page; only a 
pointer to it is.  The copying is done straight into the 
saved_command_line buffer in the kernel BSS (head.S lines 79-104).

x86-64 does the same thing, but in C code (head64.c lines 45-56.)  Thus, 
if you had a problem with LILO, I suspect the problem was inside LILO 
itself, and not a kernel issue.

	-hpa
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