Re: [PATCH v3 5/6] powerpc/64: Add support for out-of-line static calls

On Thu, Oct 06, 2022 at 11:39:50AM +1100, Michael Ellerman wrote:

Christophe Leroy [off-list ref] writes:

quoted

However, thinking out loudly, I'm wondering, could we make things any 
simpler when CONFIG_MODULES is not selected, or is that a too much 
corner case on PPC64 ?

I'd say it's mostly a corner case.

Obviously no distros ship with modules disabled. 

AFAIK even the stripped down kernels we use in CPU bringup have modules
enabled.

So I think it's probably not worth worrying about, unless there's an
obvious and fairly simple optimisation.

Long ago I built kernels that fit together with the boot firmware and a
root fs (busybox+dropbear essentially) in 4MB, but I doubt we can get
close to that at all these days :-)

What is the overhead if you enable modules but do not use them, these
days?


Segher