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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <200707181751.10276.rob@landley.net>
Date:	Wed, 18 Jul 2007 17:51:10 -0400
From:	Rob Landley <rob@...dley.net>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Jan Engelhardt <jengelh@...putergmbh.de>,
	Bodo Eggert <7eggert@....de>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][Patch] Allow not mounting a root fs

On Saturday 07 July 2007 5:17:31 pm H. Peter Anvin wrote:
> Jan Engelhardt wrote:
> > On Jul 7 2007 13:56, H. Peter Anvin wrote:
> >> 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?
> >>
> >> No, rootfs is ramfs.
> >
> > Thanks for clarifying. Well, why is it a ramfs, and not tmpfs?
> > (I think I know the difference, but the question stands.
> > A system without any swap somewhat equals a ramfs, or?)
>
> It gets initialized very early, and a lot of the setup needed for tmpfs
> to work isn't ready yet.

Out of curiosity, do you know which setup?  I know that it won't actually swap 
anything out yet because no swap is mounted, but I thought that mounting 
tmpfs and doing a swapon afterwards was ok...

> 	-hpa

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/