Date: Mon, 7 Aug 2006 08:15:19 -0700
From: Andrew Morton <akpm@osdl.org>
To: Andy Whitcroft <apw@shadowen.org>
Cc: Andi Kleen <ak@suse.de>, linux-kernel@vger.kernel.org
Subject: Re: x86_64 command line truncated
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On Mon, 07 Aug 2006 15:38:49 +0100
Andy Whitcroft <apw@shadowen.org> wrote:

> Andi Kleen wrote:
> > Andy Whitcroft <apw@shadowen.org> writes:
> > 
> >> It seems that the command line on x86_64 is being truncated during boot:
> > 
> > in mm right?
> >> Will try and track it down.
> > 
> > Don't bother, it is likely "early-param" (the patch from
> > hell). I'll investigate.
> > 
> > -Andi
> 
> Well I've narroed it down to the following patch from Andrew:
> 
> x86_64-mm-early-param.patch

Not me.  My only contribution to that patch was to scrog the changelog ;)
I'll be fixing that sometime.

I think that patch doesn't have a future, although Andi hasn't yet dropped it.

> Basically, that leads setup_arch to return saved_command_line as _the_ 
> command_line.  We then run parse_args() against it which assumes it may 
> irrevocabaly change command_line.  Previous to this patch 
> saved_command_line and command_line were separate and this was not an issue.
> 
> It feels like we should be following the model in the newly added 
> parse_early_parms() and taking a local copy of the command_line here.
> 

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