For some reason I didn't receive patches 3, 12, 17, 20, 23, 25, 29 and 31.

You can add my Reviewed-by to 3, 6, 12, 17, 20, 25, 29 and 31.

With patch 23, should __folio_lock_or_retry() return a bool?  (Same for
__lock_page_or_retry()).  Looks good apart from that.

David