Re: mm: delay rmap removal until after TLB flush

[Linus Torvalds]

On Wed, Nov 2, 2022 at 3:31 PM Gerald Schaefer
<gerald.schaefer@xxxxxxxxxxxxx> wrote:
>
> Just wondering a bit why you did not also add the
> VM_WARN_ON_ONCE_PAGE(page_mapcount(page) < 0, page), like
> in the generic change.

Heh, I had considered dropping it entirely even from the generic code,
since I don't remember seeing that ever trigger, but PeterZ convinced
me otherwise.

For the s390 side I really wanted to keep things minimal since I
(obviously) didn't even built-test it, so..

I'm perfectly happy with s390 people adding it later, of course.

                Linus