On Mon, Oct 24, 2022 at 1:24 PM Jann Horn <jannh@xxxxxxxxxx> wrote:
>
> That's why GUP-fast re-checks the PTE after it has grabbed a reference
> to the page.
Bah. I should have known that. We got that through the PPC version
that never had the whole IPI serialization thing (just the RCU
freeing).
I haven't looked at that code in much too long.
Actually, by "much too long" I really mean "thankfully I haven't needed to" ;)
Linus
