Re: [PATCH 0/5] 4.14 backports of fixes for "CoW after fork() issue"

[Linus Torvalds]

On Wed, Apr 7, 2021 at 11:47 AM Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote:
>
> So, we fixed it, but we don't know why.
>
> Peter Xu's patchset that fixed it is here:
> https://lore.kernel.org/lkml/20200821234958.7896-1-peterx@xxxxxxxxxx/

Yeah, that's the part that ends up being really painful to backport
(with all the subsequent fixes too), so the 4.14 people would prefer
to avoid it.

But I think that if it's a "requires dax pmem and ptrace on top", it
may simply be a non-issue for those users. Although who knows - maybe
that ends up being a real issue on Android..

            Linus