On Thu, Aug 15, 2019 at 11:18:04AM -0700, Matthew Wilcox wrote: > But I don't think read_mapping_page() can return a page which doesn't have > PageUptodate set. Follow the path down through read_cache_page() into > do_read_cache_page(). read_mapping_page() can't, but I think we need the check after the lock_page still.
