* Jan Engelhardt <[email protected]> wrote:
>
> On Oct 7 2007 18:59, Ingo Molnar wrote:
> >> > vmlinux:
> >> > text data bss dec hex filename
> >> > 7732358 1157269 401408 9291035 8dc51b vmlinux.before
> >> > 7732374 1157269 401408 9291051 8dc52b vmlinux.after
> >> >
> >> >16 bytes, or 0.0002% of the total text size. So there's in essence no
> >> >text overhead to talk about. So the text overhead argument is a red
> >> >herring.
> >>
> >> 16 bytes, huh? Can't be. That would be like, perhaps 5, x86 instructions.
> >
> >yes, it's that low, and it's with the feature disabled.
>
> Ah, with CONFIG_CKO=n, right. But where does that 16 byte increase
> come from, when vt.o itself remains constant in size?
comes from printk.o:
text data bss dec hex filename
6068 231 17636 23935 5d7f kernel/printk.o
6075 231 17636 23942 5d86 kernel/printk.o
the effect of the extra parameter. But that is not worth #ifdef-ing for.
For all practical purposes there's no overhead.
Ingo
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