Messages in this thread | | | Date | Wed, 5 Aug 2009 11:19:21 +0200 | From | Albin Tonnerre <> | Subject | Re: [PATCH 3/6] Add support for LZO-compressed kernels |
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On Tue, Aug 04, 2009 at 04:00:43PM -0700, Andrew Morton wrote : > On Mon, 3 Aug 2009 16:58:18 +0200 > Albin Tonnerre <albin.tonnerre@free-electrons.com> wrote:
> > This is the first part of the lzo patch > > The lzo compressor is worse than gzip at compression, but faster at > > extraction. Here are some figures for an ARM board I'm working on:
> > Uncompressed size: 3.24Mo > > gzip 1.61Mo 0.72s > > lzo 1.75Mo 0.48s
> > So for a compression ratio that is still relatively close to gzip, it's > > much faster to extract, at least in that case.
> Is 3.2Mb a typical kernel size for small systems? It sounds large.
This one actually embeds an initramfs which accounts for about half of the size.
> > +#ifdef STATIC
> What is this STATIC thing for?
That's what is currently used to test whether you're compiling the pre-boot environment. eg. include/linux/decompress/mm.h uses this to determine whether it should provide a malloc() implementation or simply #define malloc(a) kmalloc(a, GFP_KERNEL), and a lot of similar things
-- Albin Tonnerre, Free Electrons Kernel, drivers and embedded Linux development, consulting, training and support. http://free-electrons.com
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