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

On Tue, Aug 04, 2026 at 10:01:45AM -0700, Linus Torvalds wrote:
> So I'm just trying to clarify my stance - I don't hate percpu TLB
> contents per se. I hate the notion of codifying them.

I do worry that changing per-CPU data structures to support this is exactly
codifying this (and will encourage other arches to follow suit).

And I really don't think there's any way to implement this without
fundamentally changing core mm or assumptions that core mm can make.

--
Cheers, Lorenzo