On Mon, Oct 21, 2024 at 09:34:24PM +0100, Matthew Wilcox wrote: > On Mon, Oct 21, 2024 at 05:34:55PM +0000, Roman Gushchin wrote: > > Fix it by moving the mlocked flag clearance down to > > free_page_prepare(). > > Urgh, I don't like this new reference to folio in free_pages_prepare(). > It feels like a layering violation. I'll think about where else we > could put this. I agree, but it feels like it needs quite some work to do it in a nicer way, no way it can be backported to older kernels. As for this fix, I don't have better ideas...