linux-kernel - Re: [PATCH] [REPOST] x86_64, i386: Add command line length to boot protocol

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Date:	Thu, 15 Mar 2007 17:42:46 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	alon.barlev@...il.com, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [REPOST] x86_64, i386: Add command line length to boot
 protocol

Bernhard Walle wrote:
> Because the command line is increased to 2048 characters after 2.6.21,
> it's not possible for boot loaders and userspace tools to determine the length
> of the command line the kernel can understand. The benefit of knowing the
> length is that users can be warned if the command line size is too long which
> prevents surprise if things don't work after bootup.
> 
> This patch updates the boot protocol to contain a field called
> "cmdline_size" that contain the length of the command line (excluding
> the terminating zero).
> 
> The patch also adds missing fields (of protocol version 2.05) to the x86_64
> setup code.
> 
> 
> Signed-off-by: Bernhard Walle <bwalle@...e.de>
> Cc: Alon Bar-Lev <alon.barlev@...il.com>

Acked-by: H. Peter Anvin <hpa@...or.com>
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