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

Paul Mundt
2009-06-25T17:09:21Z

On Thu, Jun 25, 2009 at 05:24:59PM +0200, Michael Opdenacker wrote:
> On 06/25/2009 11:04 AM, Florian Fainelli wrote:
> > Le Thursday 25 June 2009 10:56:45 Mike Rapoport, vous avez ?crit :
> >> 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.
>
It's possible to use this generically now, yes. Anything building uImages
today can basically wire it up in a similar fashion to how blackfin has
and support it out of the box.