On Fri, Apr 22, 2022 at 10:08 AM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> Just opt-in with the mappings that matter.

Actually, we could automatically opt-in a few common cases that we
know are fundamentally ok, because they already can't play protection
games.

In particular, kvmalloc().

So I think something like this patch - along with Song's patch to
enable it for alloc_large_system_hash() - would be fairly safe, and
avoid any nasty cases.

And probably catch quite a lot of the cases that matter that can grow large.

               Linus