Re: [PATCH v2] mm: page_alloc: move mlocked flag clearance into free_pages_prepare()

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...