On Tue, Dec 21, 2021 at 06:40:30PM +0100, David Hildenbrand wrote: > What adds complexity to correctly maintain the "exclusive" state are at > least: > * KSM (might be harder, have to think about it) I know little about it, but isn't KSM like fork where it is trying to WP pages with the intention of copying them? Shouldn't KSM completely reject WP'ing a page that is under any kind of writable GUP? Jason