linux-kernel - Re: Smaller compressed kernel source tarballs?

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Message-ID: <4517C2CC.4070900@grupopie.com>
Date:	Mon, 25 Sep 2006 12:51:40 +0100
From:	Paulo Marques <pmarques@...popie.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Michael Tokarev <mjt@....msk.ru>,
	Johannes Stezenbach <js@...uxtv.org>,
	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	Dax Kelson <dax@...ulabs.com>,
	Linux kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>
Subject: Re: Smaller compressed kernel source tarballs?

H. Peter Anvin wrote:
> Michael Tokarev wrote:
>>[...]
>> On the site it's said lzma(sdk) is under rewrite to support
>> new format with magic number and crc checks...
> 
> That is an absolute must, IMO.  I would use the gzip format as a base.

If you're suggesting a gzip like format (but with different magic, 
etc.), that's ok.

However, it has been suggested on similar threads to use the CM field of 
the gzip format to introduce different compression methods.

While this is the purpose of this field, I find this to be a very bad 
idea. The worse part of it is that, after "lzma gzip" files start to 
proliferate, you never know if you can decompress a .gz with your 
version of gunzip, which is something that you currently have for granted.

If more formats start being supported inside gzip, this only gets worse...

-- 
Paulo Marques - www.grupopie.com

"The face of a child can say it all, especially the
mouth part of the face."
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