linux-kernel - Re: Monster switch for small size (was Linux-tiny revival)

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-Id: <200709201641.22580.rob@landley.net>
Date:	Thu, 20 Sep 2007 16:41:22 -0500
From:	Rob Landley <rob@...dley.net>
To:	linux-tiny@...enic.com
Cc:	Tim Bird <tim.bird@...sony.com>, Andy Whitcroft <apw@...dowen.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux kernel <linux-kernel@...r.kernel.org>,
	Michael Opdenacker <michael@...e-electrons.com>,
	CE Linux Developers List <celinux-dev@...e.celinuxforum.org>
Subject: Re: Monster switch for small size (was Linux-tiny revival)

On Thursday 20 September 2007 12:10:50 pm Tim Bird wrote:
> Andy Whitcroft wrote:
> > Knowing nothing about these options, from a test perspective it would
> > be nice if we were able to simply enable "the lot" so we can do "normal"
> > -mm runs and "tiny" -mm runs without any manual intervention?
>
> I agree completely.
>
> I have been thinking for a while about how to make a "monster switch"
> (the kind they always seem to have in Frankenstein movies) that
> switches a whole bunch of settings at once.  We currently have methods
> in the kernel for:
>  * default (or recommended) config for a particular platform
>  * all yes - to build as much as possible
>  * all no - to build as little as possible
>
> The problem with "allno" is that it rarely produces a usable
> kernel.

Beyond that, allno doesn't come close to switching everything off.

1) You have to _enable_ CONFIG_EMBEDDED in order to go into that menu and 
switch _off_ the stuff in there.

2) The stuff CONFIG_EMBEDDED reveals isn't all in that menu.  CONFIG_BLOCK is 
at the top level menu.  CONFIG_VT and CONFIG_UNIX98_PTYS are buried down 
under device drivers->character devices, and there's more sprinkled all over.  
You have to track it all down and switch it off to get an _actual_ 
allnoconfig kernel.

(I cut the bit where you reinvent miniconfig.  People keep doing this.  I dig 
it up and resubmit it every year or so, so Roman Zippel can shoot it down 
again.  Meanwhile, not only is Firmware Linux happily using it, but I even 
wrote more documentation at 
http://landley.net/code/firmware/new_platform.html although you have to 
scroll down a bit to get to the stuff about miniconfig...)

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/