Re: [PATCH v3 1/5] mm: Make per-VMA locks available universally

Jann Horn <[email protected]> Mon, 3 Aug 2026 21:33:53 +0200

Newsgroups	org.kvack.linux-mm,org.kernel.vger.linux-kernel,org.kernel.vger.netdev
Message-ID	<CAG48ez1w6oPobKZPzoRRN+Nf66PrVYRJwKQx=qwTLTR3n0EFRw@mail.gmail.com>

On Sun, Aug 2, 2026 at 11:55=E2=80=AFPM Suren Baghdasaryan <[email protected]=
om> wrote:
> The per-VMA locks have been around for several years. They've had some
> bugs worked out of them and have seen quite wide use. However, they
> are still only available when architectures explicitly enable them.
> Remove the conditional compilation around the per-VMA locks, making
> them available on all architectures and configs.

Reviewed-by: Jann Horn <[email protected]>

I've grepped around in arch-specific code in the architectures that
weren't already opted in to look for stuff that takes the mmap lock in
write mode and manually mutates VMAs, and couldn't find anything, so I
think this is correct.