Linus Torvalds <torva...@linux-foundation.org> writes: > On Thu, Jun 30, 2016 at 9:39 PM, Dave Hansen <d...@sr71.net> wrote: >> >> I think what you suggest will work if we don't consider A/D in >> pte_none(). I think there are a bunch of code path where assume that >> !pte_present() && !pte_none() means swap. > > Yeah, we would need to change pte_none() to mask off D/A, but I think > that might be the only real change needed (other than making sure that > we don't use the bits in the swap entries, I didn't look at that part > at all)
It looks like __pte_to_swp_entry also needs to be changed to mask out those bits when the swap code reads pte entries. For all of the same reasons as pte_none. Eric
