fre, 08 02 2008 kl. 17:20 -0600, skrev Matt Mackall:
> On Fri, 2008-02-08 at 23:47 +0100, Michael Opdenacker wrote:
> > This patch against x86/mm tries to revive an original patch
> > from Matt Mackall which didn't get merged at that time. It makes
> > it possible to disable support code for some processors. This can
> > be useful to support only the exact processor type used
> > in a given system.
> >
> > I may have made wrong assumptions with the code handling
> > force_mwait. As force_mwait is only declared in
> > arch/x86/kernel/cpu/amd.c, which is only compiled
> > when CONFIG_X86_32 is set, I thought it was safe
> > to make the code depend on CONFIG_CPU_SUP_AMD,
> > but I could be wrong.
> >
> > Your comments are more than welcome! To make the code
> > cleaner, I could use empty inline functions instead
> > of ifdef's, as suggested in Documentation/SubmittingPatches.
>
> Please include the output of size with all these options on and off.
The build of my currently running kernel for my laptop has
$ size -t amd.o cyrix.o centaur.o transmeta.o intel.o nexgen.o umc.o
text data bss dec hex filename
2809 316 0 3125 c35 amd.o
2387 856 0 3243 cab cyrix.o
1514 312 0 1826 722 centaur.o
1279 312 0 1591 637 transmeta.o
1783 316 0 2099 833 intel.o
126 312 0 438 1b6 nexgen.o
41 312 0 353 161 umc.o
9939 2736 0 12675 3183 (TOTALS)
That is without optimize for size compilation, with that set I get
$ size -t amd.o cyrix.o centaur.o transmeta.o intel.o nexgen.o umc.o
text data bss dec hex filename
2300 316 0 2616 a38 amd.o
2132 820 0 2952 b88 cyrix.o
1325 312 0 1637 665 centaur.o
1151 312 0 1463 5b7 transmeta.o
1575 316 0 1891 763 intel.o
107 312 0 419 1a3 nexgen.o
41 312 0 353 161 umc.o
8631 2700 0 11331 2c43 (TOTALS)
I don't think the code changes in the patch do much with respect to
size.
Simon Holm Thøgersen
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