On Thu, Oct 8, 2020 at 10:02 AM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> Here's the first patch anyway. If you actually have a test-case where
> this matters, I guess I need to apply it now..

Actually, I removed the "__page_mapcount()" part of that patch, to
keep it minimal and _only_ do remove the wrprotect trick.

We can do the __page_mapcount() optimization and the mm sequence count
for 5.10 (although so far nobody has actually written the seqcount
patch - I think it would be a trivial few-liner, but I guess it won't
make 5.10 at this point).

So here's what I ended up with.

                      Linus