linux-kernel - Re: Patches for REALLY TINY 386 kernels

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Message-ID: <Pine.LNX.4.64.0707182024231.5385@fbirervta.pbzchgretzou.qr>
Date:	Wed, 18 Jul 2007 20:29:27 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Andi Kleen <andi@...stfloor.org>
cc:	"H. Peter Anvin" <hpa@...or.com>,
	Jonathan Campbell <jon@...dgrounds.com>,
	linux-kernel@...r.kernel.org, torvalds@...nsmeta.com
Subject: Re: Patches for REALLY TINY 386 kernels


On Jul 18 2007 20:20, Andi Kleen wrote:
>> 
>> Well, how big the vmlinux file is matters if it doesn't fit in memory
>> with enough time to get to the phase where it is dumping the init
>> sections.  
>
>If you don't have enough memory for a few tens of KB of init sections
>you're very unlikely to have enough memory for user space.

If the code was not too hackish, I would not buy that.
Routers for example can run -- minus the userspace utilities required to set
things up -- "without" userspace. Maybe someone even comes along and
writes the network interface setup as __init kernel code. If not that,
maybe a code generator. I also remember someone who posted sort of a
"kernel console" patch (same reason - to avoid userspace).


	Jan
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