Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> writes: > On Thu, Jun 30, 2016 at 9:39 PM, Dave Hansen <dave@xxxxxxxx> 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>