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

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Message-ID: <469E3806.4030804@zytor.com>
Date:	Wed, 18 Jul 2007 08:55:50 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Jonathan Campbell <jon@...dgrounds.com>,
	linux-kernel@...r.kernel.org, torvalds@...nsmeta.com
Subject: Re: Patches for REALLY TINY 386 kernels

Andi Kleen wrote:
> 
>> Already with these patches I can compile a zImage kernel that is 450kb
>> large (890kb decompressed)
> 
> The important part is not how big the vmlinux is, but how much
> memory is actually used after boot. 
> 
> I expect concentrating some of the dynamic data structures would
> be more fruitful in fact.
> 

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 that is not the issue*, then axing stuff like CPUID is a
major lose in terms of code maintainability for zero gain.

	-hpa
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