linux-kernel - Re: 2.6.18-rc3-mm2 early

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Date:	Mon, 07 Aug 2006 16:08:54 +0100
From:	Andy Whitcroft <apw@...dowen.org>
To:	Hugh Dickins <hugh@...itas.com>
CC:	Andrew Morton <akpm@...l.org>,
	Rusty Russell <rusty@...tcorp.com.au>, Andi Kleen <ak@...e.de>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.18-rc3-mm2 early_param mem= fix

Hugh Dickins wrote:
> On Sun, 6 Aug 2006, Hugh Dickins wrote:
>> I was impressed by how fast 2.6.18-rc3-mm2 is under memory pressure,
>> until I noticed that my "mem=512M" boot option was doing nothing.  The
>> two fixes below got it working, but I wonder how many other early_param
>> "option=" args are wrong (e.g. "memmap=" in the same file): x86_64
>> shows many such, i386 shows only one, I've not followed it up further.
> 
> Oh, and that's not enough for it to show up in x86_64's /proc/cmdline.

Thats one I've been chasing and is caused by this same patch.  We've 
lost the separation between command_line and saved_command_line and the 
user visible line gets trunc'd.  Andi has a later version which has this 
part fixed as far as I can tell.  I'm posting a dirty patch in response 
to my report of this to at least get past this bit as our test system 
relies on the commmand line being maintained to user space.

-apw
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