Re: [PATCH] Fix incorrect flush address in direct page table reclaim

Linus Torvalds <[email protected]> Tue, 4 Aug 2026 08:54:44 -0700
Newsgroups org.kvack.linux-mm,org.kernel.vger.stable
Message-ID <CAHk-=wiO8NDCyBYrDMpjh8zMKnzgD2XuPYo0nk4Hwgq44R_jKg@mail.gmail.com>
On Tue, 4 Aug 2026 at 02:49, Vlastimil Babka (SUSE) <[email protected]> wrote:
>
> +Cc Linus for nerd sniping purposes

I don't know what to say - the patch looks obviously correct to me,
and I certainly can't disagree with the verbiage in the commit message
either.

The fact that the current code looks to be *so* broken makes me a bit
nervous that there's something subtle going on, but I *think* it's all
just a very non-subtle bug and it just happens to work because the
whole zap code typically uses the mmu_gather infrastructure and other
things end up resulting in the tlb being flushed regardless. But
that's just me waving my hands so wildly that I think I had lift-off
for a moment.

                Linus