linux-kernel - Re: Status of bzip2 and lzma kernel compression for ARM?

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Message-ID: <4A4396CB.9000703@free-electrons.com>
Date:	Thu, 25 Jun 2009 17:24:59 +0200
From:	Michael Opdenacker <michael-lists@...e-electrons.com>
To:	Florian Fainelli <florian@...nwrt.org>
CC:	Mike Rapoport <mike@...pulab.co.il>, Alain Knaff <alain@...ff.lu>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	linux-embedded mailing list <linux-embedded@...r.kernel.org>
Subject: Re: Status of bzip2 and lzma kernel compression for ARM?

On 06/25/2009 11:04 AM, Florian Fainelli wrote:
> Le Thursday 25 June 2009 10:56:45 Mike Rapoport, vous avez écrit :
>> I'm not sure what exactly do you mean by "test bzip2 and lzma compression
>> on ARM", but if you refer to internal initramfs compression, I can tell
>> that I've used lzma compression on PXA270 and it works fine.
>>     
>
> I think Michael refers to the lzma decompressor which allows you to use a 
> lzma-compressed kernel as a (b)zImage with its architecture specific 
> decompressor piggy-backed in the (b)zImage.
>
> Such thing would also be very useful on MIPS and PowerPC as well.
>   
Yes, that's what I meant: using a bzip2 or lzma compressed kernel. I
would like to know the boot time impact on an ARM board.

If I don't get any answer from Alain in the next days, I will propose a
patch update for ARM.

Cheers,

Michael.

-- 
Michael Opdenacker, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com

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