linux-kernel - Re: [RFC][Patch] Allow not mounting a root fs

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Date:	Sat, 7 Jul 2007 23:18:59 +0200 (CEST)
From:	Bodo Eggert <7eggert@....de>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
cc:	"H. Peter Anvin" <hpa@...or.com>, Bodo Eggert <7eggert@....de>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][Patch] Allow not mounting a root fs

On Sat, 7 Jul 2007, Jan Engelhardt wrote:
> On Jul 5 2007 19:08, H. Peter Anvin wrote:

> >> BTW: Is it possible to mount a tmpfs on / before extracting the cpio?
> >
> >Not in the stock kernel.  There have been some patches floating around
> >for that, I think.
> 
> What would it buy? rootfs is a tmpfs, is not it?

As far as I understand, it is a ramfs aka. non-swappable tmpfs without any 
limit and including a chance of DoSing the system.

Since I'm toying with root-on-initcpio, I'm looking for things that might 
make the task some easier.

Currently I'm thinking about changing the root=initramfs to root=tmpfs and
additionally mounting a tmpfs on / before unpacking the cpios. OTOH, this 
seems to be a little bit messy. OTOH again, in _that_ boot code, nobody
should complain :)

-- 
"Whoever said the pen is mightier than the sword obviously never
encountered automatic weapons."
-Gen. Douglas MacArthur
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