Re: Bloat report 2.6.3 -> 2.6.4

From: Matt Mackall
Date: Fri Mar 12 2004 - 18:56:05 EST

On Fri, Mar 12, 2004 at 03:22:06PM -0800, Andrew Morton wrote:
> Matt Mackall <mpm@xxxxxxxxxxx> wrote:
> >
> > 2.6.3 -> 2.6.4
> >
> > text data bss dec hex filename
> > 3313135 660247 162472 4135854 3f1bae vmlinux-2.6.3-c2.6.3
> > 3342019 664154 162344 4168517 3f9b45 vmlinux-2.6.4-c2.6.3
> >
> > [ Results of size <a> <b>. -c2.6.3 means both kernel images were built
> > with the 2.6.3 defconfig.
> But defconfig was changed between 2.6.3 and 2.6.4.

Yes, and I'm attempting to compensate for that because defconfig
changes tend to overwhelm other stuff in the results.

My strategy here doesn't work as well as I'd hoped. I'm taking the
defconfig from the previous kernel and then running yes "" | make
oldconfig, which sets any new symbols to their defaults. So this deals
with case where existing symbols change defaults, but doesn't address
new symbols at all.

And what's happening with some of the new symbols is that they're off
in defconfig but on in Kconfig. So I need to come up with a way to
take the old defconfig and merge in new symbols from the new
defconfig. Then throw it at make oldconfig to drop out any obsolete

Matt Mackall : : Linux development and consulting
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