Re: [RFC v2 PATCH 0/16] Optimize this_cpu_*() ops for non-x86 (ARM64 for this series)

Linus Torvalds <[email protected]> Tue, 4 Aug 2026 09:30:08 -0700

Newsgroups	gmane.linux.kernel,gmane.linux.kernel.mm,gmane.linux.ports.arm.kernel
Message-ID	<CAHk-=wha5um2rB9u7EDeEhZJyaWOUFye-wTKzsykQqJH41RNdw@mail.gmail.com>

On Tue, 4 Aug 2026 at 09:27, Christoph Lameter (Ampere) <[email protected]> wrote:
>
> We certainly do not want to replicate that approach. We are using the per
> cpu page tables to avoid address calculations in the VM that other
> platforms can do with a segment override.

Right, and I said that that's ok as long as it's a internal
architecture thing. Not a "this is how the VM works".

Because people really have wanted to make it a "this is how the VM
works" thing. And that is very much what I object to.

              Linus