Re: [tip:x86/mm] x86/boot/compressed/64: Describe the logic behind the LA57 check

Ingo Molnar
2018-03-12T17:41:29Z

* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> But regardless, I think we're better off with a "wait and see" approach.
>
> IOW, try to use 5-level whenever possible for now, and _if_ somebody actually
> can show that 4-level page tables perform better or have some other advantage,
> we can then try to be clever later when it's all tested and it's just an
> optimization, not a "that code won't even run normally and gets basically zero
> coverage".

Ok, fair enough - and the testing argument makes sense as well.

Thanks,

Ingo