On Tue, Apr 25, 2023 at 12:03:34AM +0100, Lorenzo Stoakes wrote: > Except you dirty a page that is mapped elsewhere that thought everything > was cleaned and... not sure the PTLs really help you much? If we have a writable PTE then while the PTE's PTL is held it is impossible for a FS to make the page clean as any cleaning action has to also take the PTL to make the PTE non-present or non-writable. > If we want to be more adventerous the opt-in variant could default to on > for FOLL_LONGTERM too, but that discussion can be had over on that patch > series. I think you should at least do this too to explain why io_uring code is moving into common code.. Jason
