Re: [PATCH RFC 00/19] mm/gup: remove FOLL_FORCE usage from drivers (reliable R/O long-term pinning)

[David Hildenbrand]

On 07.11.22 18:27, Linus Torvalds wrote:
> On Mon, Nov 7, 2022 at 8:18 AM David Hildenbrand <david@xxxxxxxxxx> wrote:
> > So instead, make R/O long-term pinning work as expected, by breaking COW
> > in a COW mapping early, such that we can remove any FOLL_FORCE usage from
> > drivers.
>
> Nothing makes me unhappy from a quick scan through these patches.
>
> And I'd really love to just have this long saga ended, and FOLL_FORCE
> finally relegated to purely ptrace accesses.
>
> So an enthusiastic Ack from me.

Thanks Linus! My hope is that we can remove it from all drivers and not 
have to leave it in for some corner cases; so far it looks promising.

--
Thanks,

David / dhildenb