[PATCH 1/2] powerpc: enable the relocatable support for the fsl booke 32bit kernel

[Kevin Hao]

On Mon, Jul 08, 2013 at 11:48:25AM -0500, Scott Wood wrote:
> On 07/03/2013 08:08:18 PM, Kevin Hao wrote:
> >On Wed, Jul 03, 2013 at 03:38:27PM -0500, Scott Wood wrote:
> >> On 07/02/2013 10:00:44 PM, Kevin Hao wrote:
> >> >On Tue, Jul 02, 2013 at 05:39:18PM -0500, Scott Wood wrote:
> >> >> How much overhead (space and time) is this really?
> >> >
> >> >The following is the additional sections when relocatable is
> >> >enabled for
> >> >a p2020rdb board.
> >> >   section        size
> >> >  .dynsym       000007f0
> >> >  .dynstr       00000926
> >> >  .dynamic      00000080
> >> >  .hash         00000388
> >> >  .interp       00000011
> >> >  .rela.dyn     00215250
> >> >
> >> >The time for the relocation is about 32ms on a p2020rdb board.
> >>
> >> Hmm... more relocations than I expected.  What percentage is this of
> >> the total image size?
> >
> >The size of vmlinux.bin is about 10M. The percentage of the relocation
> >section is about 20%. But look on the bright side of thing, all
> >the relocation
> >stuff are in init section and should be discarded at runtime. :-)
> 
> That doesn't reduce the space it takes up in flash...

Yes. But since we always use a compressed uImage kernel in flash,
the increasing size of the image would shrink to about 500K.

Thanks,
Kevin

> 
> -Scott
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