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SubjectRe: kernel optimization
This is a airly frequent question

the short answer is 'don't try'

the longer answer is that all the additional optimization options that are
part of O3+ are considered individually and if they make sense for the
kernel they are explicitly enabled (in some cases the optimizations need
to be explicitly turned off for proper functionality of the kernel under
all versions of GCC)

David Lang

On Fri, 22 Jul 2005, christos gentsis wrote:

> Date: Fri, 22 Jul 2005 19:55:48 +0100
> From: christos gentsis <christos_gentsis@yahoo.co.uk>
> To: linux-kernel@vger.kernel.org
> Subject: kernel optimization
>
> hello
>
> i would like to ask if it possible to change the optimization of the kernel
> from -O2 to -O3 :D, how can i do that? if i change it to the top level
> Makefile does it change to all the Makefiles?
>
> And let's say that i change it... does this generate any problems with the
> space that the kernel will take? (the kernel will be much larger)
>
> Thanks
> Chris
>
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There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies.
-- C.A.R. Hoare
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