On Thu, Jul 11, 2024 at 07:54:34PM +0200, Jason A. Donenfeld wrote: > On Thu, Jul 11, 2024 at 07:27:27PM +0200, David Hildenbrand wrote: > > > PG_owner_priv_1 maps to PG_swapcache? :) > > > > Maybe the combination !swapbacked && swapcache could be used to indicate > > such folios. (we will never set swapbacked) > > > > But likely we have to be a bit careful here. We don't want > > folio_test_swapcache() to return for folios that ... are not in the > > swapcache. > > I was thinking that too, but I'm afraid it's going to be another > whack-a-mole nightmare. Even for things like task_mmu in procfs that > show stats, that's going to be wonky. > > Any other flags we can overload that aren't going to be already used in > our case? PG_error / folio_set_error seems unused in the non-IO case.
